From: Rafał Miłecki Date: Tue, 10 Sep 2024 11:43:03 +0000 (+0200) Subject: kernel: backport nvmem changes from v6.11 X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=7d3789de99e38a9beacca804b2fb919386645a0b;p=openwrt%2Fstaging%2Fansuel.git kernel: backport nvmem changes from v6.11 Signed-off-by: Rafał Miłecki --- diff --git a/target/linux/generic/backport-5.15/838-v6.11-0001-nvmem-add-missing-MODULE_DESCRIPTION-macros.patch b/target/linux/generic/backport-5.15/838-v6.11-0001-nvmem-add-missing-MODULE_DESCRIPTION-macros.patch new file mode 100644 index 0000000000..a8ce832408 --- /dev/null +++ b/target/linux/generic/backport-5.15/838-v6.11-0001-nvmem-add-missing-MODULE_DESCRIPTION-macros.patch @@ -0,0 +1,48 @@ +From c553bad4c5fc5ae44bd2fcaa73e1d6bedfb1c35c Mon Sep 17 00:00:00 2001 +From: Jeff Johnson +Date: Fri, 5 Jul 2024 08:48:38 +0100 +Subject: [PATCH] nvmem: add missing MODULE_DESCRIPTION() macros + +make allmodconfig && make W=1 C=1 reports: +WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/nvmem/nvmem-apple-efuses.o +WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/nvmem/nvmem_brcm_nvram.o +WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/nvmem/nvmem_u-boot-env.o + +Add the missing invocations of the MODULE_DESCRIPTION() macro. + +Signed-off-by: Jeff Johnson +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-2-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/apple-efuses.c | 1 + + drivers/nvmem/brcm_nvram.c | 1 + + drivers/nvmem/u-boot-env.c | 1 + + 3 files changed, 3 insertions(+) + +--- a/drivers/nvmem/apple-efuses.c ++++ b/drivers/nvmem/apple-efuses.c +@@ -78,4 +78,5 @@ static struct platform_driver apple_efus + module_platform_driver(apple_efuses_driver); + + MODULE_AUTHOR("Sven Peter "); ++MODULE_DESCRIPTION("Apple SoC eFuse driver"); + MODULE_LICENSE("GPL"); +--- a/drivers/nvmem/brcm_nvram.c ++++ b/drivers/nvmem/brcm_nvram.c +@@ -253,5 +253,6 @@ static int __init brcm_nvram_init(void) + subsys_initcall_sync(brcm_nvram_init); + + MODULE_AUTHOR("Rafał Miłecki"); ++MODULE_DESCRIPTION("Broadcom I/O-mapped NVRAM support driver"); + MODULE_LICENSE("GPL"); + MODULE_DEVICE_TABLE(of, brcm_nvram_of_match_table); +--- a/drivers/nvmem/u-boot-env.c ++++ b/drivers/nvmem/u-boot-env.c +@@ -249,5 +249,6 @@ static struct platform_driver u_boot_env + module_platform_driver(u_boot_env_driver); + + MODULE_AUTHOR("Rafał Miłecki"); ++MODULE_DESCRIPTION("U-Boot environment variables support module"); + MODULE_LICENSE("GPL"); + MODULE_DEVICE_TABLE(of, u_boot_env_of_match_table); diff --git a/target/linux/generic/backport-5.15/838-v6.11-0002-nvmem-meson-efuse-Replacing-the-use-of-of_node_put-t.patch b/target/linux/generic/backport-5.15/838-v6.11-0002-nvmem-meson-efuse-Replacing-the-use-of-of_node_put-t.patch new file mode 100644 index 0000000000..05c82dbf6f --- /dev/null +++ b/target/linux/generic/backport-5.15/838-v6.11-0002-nvmem-meson-efuse-Replacing-the-use-of-of_node_put-t.patch @@ -0,0 +1,48 @@ +From 5fecb932607d83d37a703c731268e9d9051457f5 Mon Sep 17 00:00:00 2001 +From: MarileneGarcia +Date: Fri, 5 Jul 2024 08:48:40 +0100 +Subject: [PATCH] nvmem: meson-efuse: Replacing the use of of_node_put to + __free + +Use __free for device_node values, and thus drop calls to +of_node_put. + +The goal is to reduce memory management issues by using this +scope-based of_node_put() cleanup to simplify function exit +handling. When using __free a resource is allocated within a +block, it is automatically freed at the end of the block. + +Suggested-by: Julia Lawall +Signed-off-by: MarileneGarcia +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-4-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/meson-efuse.c | 5 ++--- + 1 file changed, 2 insertions(+), 3 deletions(-) + +--- a/drivers/nvmem/meson-efuse.c ++++ b/drivers/nvmem/meson-efuse.c +@@ -48,20 +48,19 @@ static int meson_efuse_probe(struct plat + { + struct device *dev = &pdev->dev; + struct meson_sm_firmware *fw; +- struct device_node *sm_np; + struct nvmem_device *nvmem; + struct nvmem_config *econfig; + struct clk *clk; + unsigned int size; ++ struct device_node *sm_np __free(device_node) = ++ of_parse_phandle(pdev->dev.of_node, "secure-monitor", 0); + +- sm_np = of_parse_phandle(pdev->dev.of_node, "secure-monitor", 0); + if (!sm_np) { + dev_err(&pdev->dev, "no secure-monitor node\n"); + return -ENODEV; + } + + fw = meson_sm_get(sm_np); +- of_node_put(sm_np); + if (!fw) + return -EPROBE_DEFER; + diff --git a/target/linux/generic/backport-5.15/838-v6.11-0003-nvmem-rockchip-otp-set-add_legacy_fixed_of_cells-con.patch b/target/linux/generic/backport-5.15/838-v6.11-0003-nvmem-rockchip-otp-set-add_legacy_fixed_of_cells-con.patch new file mode 100644 index 0000000000..a8a30fc810 --- /dev/null +++ b/target/linux/generic/backport-5.15/838-v6.11-0003-nvmem-rockchip-otp-set-add_legacy_fixed_of_cells-con.patch @@ -0,0 +1,28 @@ +From 2933e79db3c00a8cdc56f6bb050a857fec1875ad Mon Sep 17 00:00:00 2001 +From: Heiko Stuebner +Date: Fri, 5 Jul 2024 08:48:41 +0100 +Subject: [PATCH] nvmem: rockchip-otp: set add_legacy_fixed_of_cells config + option + +The Rockchip OTP describes its layout via devicetree subnodes, +so set the appropriate property. + +Fixes: 2cc3b37f5b6d ("nvmem: add explicit config option to read old syntax fixed OF cells") +Signed-off-by: Heiko Stuebner +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-5-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/rockchip-otp.c | 1 + + 1 file changed, 1 insertion(+) + +--- a/drivers/nvmem/rockchip-otp.c ++++ b/drivers/nvmem/rockchip-otp.c +@@ -255,6 +255,7 @@ static int rockchip_otp_read(void *conte + static struct nvmem_config otp_config = { + .name = "rockchip-otp", + .owner = THIS_MODULE, ++ .add_legacy_fixed_of_cells = true, + .read_only = true, + .stride = 1, + .word_size = 1, diff --git a/target/linux/generic/backport-5.15/838-v6.11-0004-nvmem-rockchip-otp-Set-type-to-OTP.patch b/target/linux/generic/backport-5.15/838-v6.11-0004-nvmem-rockchip-otp-Set-type-to-OTP.patch new file mode 100644 index 0000000000..8491eb3c9c --- /dev/null +++ b/target/linux/generic/backport-5.15/838-v6.11-0004-nvmem-rockchip-otp-Set-type-to-OTP.patch @@ -0,0 +1,25 @@ +From 39f95600d8c53355b212a117e91a6ba15e0cac47 Mon Sep 17 00:00:00 2001 +From: Heiko Stuebner +Date: Fri, 5 Jul 2024 08:48:42 +0100 +Subject: [PATCH] nvmem: rockchip-otp: Set type to OTP + +The Rockchip OTP is obviously an OTP memory, so document this fact. + +Signed-off-by: Heiko Stuebner +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-6-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/rockchip-otp.c | 1 + + 1 file changed, 1 insertion(+) + +--- a/drivers/nvmem/rockchip-otp.c ++++ b/drivers/nvmem/rockchip-otp.c +@@ -256,6 +256,7 @@ static struct nvmem_config otp_config = + .name = "rockchip-otp", + .owner = THIS_MODULE, + .add_legacy_fixed_of_cells = true, ++ .type = NVMEM_TYPE_OTP, + .read_only = true, + .stride = 1, + .word_size = 1, diff --git a/target/linux/generic/backport-5.15/838-v6.11-0005-nvmem-rockchip-efuse-set-type-to-OTP.patch b/target/linux/generic/backport-5.15/838-v6.11-0005-nvmem-rockchip-efuse-set-type-to-OTP.patch new file mode 100644 index 0000000000..260b03eb03 --- /dev/null +++ b/target/linux/generic/backport-5.15/838-v6.11-0005-nvmem-rockchip-efuse-set-type-to-OTP.patch @@ -0,0 +1,26 @@ +From ba64a04474d2989f397982c48e405cfd785e2dd5 Mon Sep 17 00:00:00 2001 +From: Heiko Stuebner +Date: Fri, 5 Jul 2024 08:48:43 +0100 +Subject: [PATCH] nvmem: rockchip-efuse: set type to OTP + +This device currently reports an "Unknown" type in sysfs. +Since it is an eFuse hardware device, set its type to OTP. + +Signed-off-by: Heiko Stuebner +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-7-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/rockchip-efuse.c | 1 + + 1 file changed, 1 insertion(+) + +--- a/drivers/nvmem/rockchip-efuse.c ++++ b/drivers/nvmem/rockchip-efuse.c +@@ -206,6 +206,7 @@ static int rockchip_rk3399_efuse_read(vo + static struct nvmem_config econfig = { + .name = "rockchip-efuse", + .add_legacy_fixed_of_cells = true, ++ .type = NVMEM_TYPE_OTP, + .stride = 1, + .word_size = 1, + .read_only = true, diff --git a/target/linux/generic/backport-5.15/838-v6.11-0006-nvmem-core-add-single-sysfs-group.patch b/target/linux/generic/backport-5.15/838-v6.11-0006-nvmem-core-add-single-sysfs-group.patch new file mode 100644 index 0000000000..4fb2afd2fa --- /dev/null +++ b/target/linux/generic/backport-5.15/838-v6.11-0006-nvmem-core-add-single-sysfs-group.patch @@ -0,0 +1,42 @@ +From 6188f233161c6a5b2d1c396a221dfafc77dc9eec Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= +Date: Fri, 5 Jul 2024 08:48:46 +0100 +Subject: [PATCH] nvmem: core: add single sysfs group +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +The sysfs core provides a function to easily register a single group. +Use it and remove the now unnecessary nvmem_cells_groups array. + +Signed-off-by: Thomas Weißschuh +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-10-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/core.c | 7 +------ + 1 file changed, 1 insertion(+), 6 deletions(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -368,11 +368,6 @@ static const struct attribute_group *nvm + NULL, + }; + +-static const struct attribute_group *nvmem_cells_groups[] = { +- &nvmem_cells_group, +- NULL, +-}; +- + static struct bin_attribute bin_attr_nvmem_eeprom_compat = { + .attr = { + .name = "eeprom", +@@ -477,7 +472,7 @@ static int nvmem_populate_sysfs_cells(st + + nvmem_cells_group.bin_attrs = cells_attrs; + +- ret = device_add_groups(&nvmem->dev, nvmem_cells_groups); ++ ret = device_add_group(&nvmem->dev, &nvmem_cells_group); + if (ret) + goto unlock_mutex; + diff --git a/target/linux/generic/backport-5.15/838-v6.11-0007-nvmem-core-remove-global-nvmem_cells_group.patch b/target/linux/generic/backport-5.15/838-v6.11-0007-nvmem-core-remove-global-nvmem_cells_group.patch new file mode 100644 index 0000000000..ef626d37a0 --- /dev/null +++ b/target/linux/generic/backport-5.15/838-v6.11-0007-nvmem-core-remove-global-nvmem_cells_group.patch @@ -0,0 +1,83 @@ +From 6839fed062b7898665983368c88269a6fb1fc10f Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= +Date: Fri, 5 Jul 2024 08:48:47 +0100 +Subject: [PATCH] nvmem: core: remove global nvmem_cells_group +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +nvmem_cells_groups is a global variable that is also mutated. +This is complicated and error-prone. + +Instead use a normal stack variable. + +Signed-off-by: Thomas Weißschuh +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-11-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/core.c | 26 ++++++++++---------------- + 1 file changed, 10 insertions(+), 16 deletions(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -358,11 +358,6 @@ static const struct attribute_group nvme + .is_bin_visible = nvmem_bin_attr_is_visible, + }; + +-/* Cell attributes will be dynamically allocated */ +-static struct attribute_group nvmem_cells_group = { +- .name = "cells", +-}; +- + static const struct attribute_group *nvmem_dev_groups[] = { + &nvmem_bin_group, + NULL, +@@ -424,23 +419,24 @@ static void nvmem_sysfs_remove_compat(st + + static int nvmem_populate_sysfs_cells(struct nvmem_device *nvmem) + { +- struct bin_attribute **cells_attrs, *attrs; ++ struct attribute_group group = { ++ .name = "cells", ++ }; + struct nvmem_cell_entry *entry; ++ struct bin_attribute *attrs; + unsigned int ncells = 0, i = 0; + int ret = 0; + + mutex_lock(&nvmem_mutex); + +- if (list_empty(&nvmem->cells) || nvmem->sysfs_cells_populated) { +- nvmem_cells_group.bin_attrs = NULL; ++ if (list_empty(&nvmem->cells) || nvmem->sysfs_cells_populated) + goto unlock_mutex; +- } + + /* Allocate an array of attributes with a sentinel */ + ncells = list_count_nodes(&nvmem->cells); +- cells_attrs = devm_kcalloc(&nvmem->dev, ncells + 1, +- sizeof(struct bin_attribute *), GFP_KERNEL); +- if (!cells_attrs) { ++ group.bin_attrs = devm_kcalloc(&nvmem->dev, ncells + 1, ++ sizeof(struct bin_attribute *), GFP_KERNEL); ++ if (!group.bin_attrs) { + ret = -ENOMEM; + goto unlock_mutex; + } +@@ -466,13 +462,11 @@ static int nvmem_populate_sysfs_cells(st + goto unlock_mutex; + } + +- cells_attrs[i] = &attrs[i]; ++ group.bin_attrs[i] = &attrs[i]; + i++; + } + +- nvmem_cells_group.bin_attrs = cells_attrs; +- +- ret = device_add_group(&nvmem->dev, &nvmem_cells_group); ++ ret = device_add_group(&nvmem->dev, &group); + if (ret) + goto unlock_mutex; + diff --git a/target/linux/generic/backport-5.15/838-v6.11-0008-nvmem-core-drop-unnecessary-range-checks-in-sysfs-ca.patch b/target/linux/generic/backport-5.15/838-v6.11-0008-nvmem-core-drop-unnecessary-range-checks-in-sysfs-ca.patch new file mode 100644 index 0000000000..9b6251b919 --- /dev/null +++ b/target/linux/generic/backport-5.15/838-v6.11-0008-nvmem-core-drop-unnecessary-range-checks-in-sysfs-ca.patch @@ -0,0 +1,61 @@ +From 588773802c386d38f9c4e91acd47369e89d95a30 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= +Date: Fri, 5 Jul 2024 08:48:48 +0100 +Subject: [PATCH] nvmem: core: drop unnecessary range checks in sysfs callbacks +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +The same checks have already been done in sysfs_kf_bin_write() and +sysfs_kf_bin_read() just before the callbacks are invoked. + +Signed-off-by: Thomas Weißschuh +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-12-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/core.c | 14 -------------- + 1 file changed, 14 deletions(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -204,19 +204,12 @@ static ssize_t bin_attr_nvmem_read(struc + dev = kobj_to_dev(kobj); + nvmem = to_nvmem_device(dev); + +- /* Stop the user from reading */ +- if (pos >= nvmem->size) +- return 0; +- + if (!IS_ALIGNED(pos, nvmem->stride)) + return -EINVAL; + + if (count < nvmem->word_size) + return -EINVAL; + +- if (pos + count > nvmem->size) +- count = nvmem->size - pos; +- + count = round_down(count, nvmem->word_size); + + if (!nvmem->reg_read) +@@ -244,19 +237,12 @@ static ssize_t bin_attr_nvmem_write(stru + dev = kobj_to_dev(kobj); + nvmem = to_nvmem_device(dev); + +- /* Stop the user from writing */ +- if (pos >= nvmem->size) +- return -EFBIG; +- + if (!IS_ALIGNED(pos, nvmem->stride)) + return -EINVAL; + + if (count < nvmem->word_size) + return -EINVAL; + +- if (pos + count > nvmem->size) +- count = nvmem->size - pos; +- + count = round_down(count, nvmem->word_size); + + if (!nvmem->reg_write) diff --git a/target/linux/generic/backport-5.15/838-v6.11-0009-nvmem-Use-sysfs_emit-for-type-attribute.patch b/target/linux/generic/backport-5.15/838-v6.11-0009-nvmem-Use-sysfs_emit-for-type-attribute.patch new file mode 100644 index 0000000000..3da1febaf1 --- /dev/null +++ b/target/linux/generic/backport-5.15/838-v6.11-0009-nvmem-Use-sysfs_emit-for-type-attribute.patch @@ -0,0 +1,30 @@ +From 08c367e45b6d322956878774f0b88bf5e52c6d54 Mon Sep 17 00:00:00 2001 +From: Marek Vasut +Date: Fri, 5 Jul 2024 08:48:51 +0100 +Subject: [PATCH] nvmem: Use sysfs_emit() for type attribute + +Use sysfs_emit() instead of sprintf() to follow best practice per +Documentation/filesystems/sysfs.rst +" +show() should only use sysfs_emit()... +" + +Signed-off-by: Marek Vasut +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-15-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/core.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -180,7 +180,7 @@ static ssize_t type_show(struct device * + { + struct nvmem_device *nvmem = to_nvmem_device(dev); + +- return sprintf(buf, "%s\n", nvmem_type_str[nvmem->type]); ++ return sysfs_emit(buf, "%s\n", nvmem_type_str[nvmem->type]); + } + + static DEVICE_ATTR_RO(type); diff --git a/target/linux/generic/backport-5.15/838-v6.11-0010-nvmem-core-Implement-force_ro-sysfs-attribute.patch b/target/linux/generic/backport-5.15/838-v6.11-0010-nvmem-core-Implement-force_ro-sysfs-attribute.patch new file mode 100644 index 0000000000..ac7dda1bdf --- /dev/null +++ b/target/linux/generic/backport-5.15/838-v6.11-0010-nvmem-core-Implement-force_ro-sysfs-attribute.patch @@ -0,0 +1,122 @@ +From 9d7eb234ac7a56b88aea8a52ed81553a730fe25c Mon Sep 17 00:00:00 2001 +From: Marek Vasut +Date: Fri, 5 Jul 2024 08:48:52 +0100 +Subject: [PATCH] nvmem: core: Implement force_ro sysfs attribute + +Implement "force_ro" sysfs attribute to allow users to set read-write +devices as read-only and back to read-write from userspace. The choice +of the name is based on MMC core 'force_ro' attribute. + +This solves a situation where an AT24 I2C EEPROM with GPIO based nWP +signal may have to be occasionally updated. Such I2C EEPROM device is +usually set as read-only during most of the regular system operation, +but in case it has to be updated in a controlled manner, it could be +unlocked using this new "force_ro" sysfs attribute and then re-locked +again. + +The "read-only" DT property and config->read_only configuration is +respected and is used to set default state of the device, read-only +or read-write, for devices which do implement .reg_write function. +For devices which do not implement .reg_write function, the device +is unconditionally read-only and the "force_ro" attribute is not +visible. + +Signed-off-by: Marek Vasut +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-16-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + Documentation/ABI/stable/sysfs-bus-nvmem | 17 ++++++++++ + drivers/nvmem/core.c | 43 ++++++++++++++++++++++++ + 2 files changed, 60 insertions(+) + +--- a/Documentation/ABI/stable/sysfs-bus-nvmem ++++ b/Documentation/ABI/stable/sysfs-bus-nvmem +@@ -1,3 +1,20 @@ ++What: /sys/bus/nvmem/devices/.../force_ro ++Date: June 2024 ++KernelVersion: 6.11 ++Contact: Marek Vasut ++Description: ++ This read/write attribute allows users to set read-write ++ devices as read-only and back to read-write from userspace. ++ This can be used to unlock and relock write-protection of ++ devices which are generally locked, except during sporadic ++ programming operation. ++ Read returns '0' or '1' for read-write or read-only modes ++ respectively. ++ Write parses one of 'YyTt1NnFf0', or [oO][NnFf] for "on" ++ and "off", i.e. what kstrbool() supports. ++ Note: This file is only present if CONFIG_NVMEM_SYSFS ++ is enabled. ++ + What: /sys/bus/nvmem/devices/.../nvmem + Date: July 2015 + KernelVersion: 4.2 +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -185,7 +185,30 @@ static ssize_t type_show(struct device * + + static DEVICE_ATTR_RO(type); + ++static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr, ++ char *buf) ++{ ++ struct nvmem_device *nvmem = to_nvmem_device(dev); ++ ++ return sysfs_emit(buf, "%d\n", nvmem->read_only); ++} ++ ++static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr, ++ const char *buf, size_t count) ++{ ++ struct nvmem_device *nvmem = to_nvmem_device(dev); ++ int ret = kstrtobool(buf, &nvmem->read_only); ++ ++ if (ret < 0) ++ return ret; ++ ++ return count; ++} ++ ++static DEVICE_ATTR_RW(force_ro); ++ + static struct attribute *nvmem_attrs[] = { ++ &dev_attr_force_ro.attr, + &dev_attr_type.attr, + NULL, + }; +@@ -286,6 +309,25 @@ static umode_t nvmem_bin_attr_is_visible + return nvmem_bin_attr_get_umode(nvmem); + } + ++static umode_t nvmem_attr_is_visible(struct kobject *kobj, ++ struct attribute *attr, int i) ++{ ++ struct device *dev = kobj_to_dev(kobj); ++ struct nvmem_device *nvmem = to_nvmem_device(dev); ++ ++ /* ++ * If the device has no .reg_write operation, do not allow ++ * configuration as read-write. ++ * If the device is set as read-only by configuration, it ++ * can be forced into read-write mode using the 'force_ro' ++ * attribute. ++ */ ++ if (attr == &dev_attr_force_ro.attr && !nvmem->reg_write) ++ return 0; /* Attribute not visible */ ++ ++ return attr->mode; ++} ++ + static struct nvmem_cell *nvmem_create_cell(struct nvmem_cell_entry *entry, + const char *id, int index); + +@@ -342,6 +384,7 @@ static const struct attribute_group nvme + .bin_attrs = nvmem_bin_attributes, + .attrs = nvmem_attrs, + .is_bin_visible = nvmem_bin_attr_is_visible, ++ .is_visible = nvmem_attr_is_visible, + }; + + static const struct attribute_group *nvmem_dev_groups[] = { diff --git a/target/linux/generic/backport-5.15/838-v6.11-0011-nvmem-u-boot-env-error-if-NVMEM-device-is-too-small.patch b/target/linux/generic/backport-5.15/838-v6.11-0011-nvmem-u-boot-env-error-if-NVMEM-device-is-too-small.patch new file mode 100644 index 0000000000..70d420f205 --- /dev/null +++ b/target/linux/generic/backport-5.15/838-v6.11-0011-nvmem-u-boot-env-error-if-NVMEM-device-is-too-small.patch @@ -0,0 +1,40 @@ +From 8679e8b4a1ebdb40c4429e49368d29353e07b601 Mon Sep 17 00:00:00 2001 +From: John Thomson +Date: Mon, 2 Sep 2024 15:25:08 +0100 +Subject: [PATCH] nvmem: u-boot-env: error if NVMEM device is too small +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Verify data size before trying to parse it to avoid reading out of +buffer. This could happen in case of problems at MTD level or invalid DT +bindings. + +Signed-off-by: John Thomson +Cc: stable +Fixes: d5542923f200 ("nvmem: add driver handling U-Boot environment variables") +[rmilecki: simplify commit description & rebase] +Signed-off-by: Rafał Miłecki +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240902142510.71096-2-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/u-boot-env.c | 7 +++++++ + 1 file changed, 7 insertions(+) + +--- a/drivers/nvmem/u-boot-env.c ++++ b/drivers/nvmem/u-boot-env.c +@@ -176,6 +176,13 @@ static int u_boot_env_parse(struct u_boo + data_offset = offsetof(struct u_boot_env_image_broadcom, data); + break; + } ++ ++ if (dev_size < data_offset) { ++ dev_err(dev, "Device too small for u-boot-env\n"); ++ err = -EIO; ++ goto err_kfree; ++ } ++ + crc32_addr = (__le32 *)(buf + crc32_offset); + crc32 = le32_to_cpu(*crc32_addr); + crc32_data_len = dev_size - crc32_data_offset; diff --git a/target/linux/generic/backport-5.15/838-v6.11-0012-nvmem-Fix-return-type-of-devm_nvmem_device_get-in-ke.patch b/target/linux/generic/backport-5.15/838-v6.11-0012-nvmem-Fix-return-type-of-devm_nvmem_device_get-in-ke.patch new file mode 100644 index 0000000000..08f6278849 --- /dev/null +++ b/target/linux/generic/backport-5.15/838-v6.11-0012-nvmem-Fix-return-type-of-devm_nvmem_device_get-in-ke.patch @@ -0,0 +1,37 @@ +From c69f37f6559a8948d70badd2b179db7714dedd62 Mon Sep 17 00:00:00 2001 +From: Geert Uytterhoeven +Date: Mon, 2 Sep 2024 15:25:09 +0100 +Subject: [PATCH] nvmem: Fix return type of devm_nvmem_device_get() in + kerneldoc + +devm_nvmem_device_get() returns an nvmem device, not an nvmem cell. + +Fixes: e2a5402ec7c6d044 ("nvmem: Add nvmem_device based consumer apis.") +Cc: stable +Signed-off-by: Geert Uytterhoeven +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240902142510.71096-3-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/core.c | 6 +++--- + 1 file changed, 3 insertions(+), 3 deletions(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -1276,13 +1276,13 @@ void nvmem_device_put(struct nvmem_devic + EXPORT_SYMBOL_GPL(nvmem_device_put); + + /** +- * devm_nvmem_device_get() - Get nvmem cell of device form a given id ++ * devm_nvmem_device_get() - Get nvmem device of device form a given id + * + * @dev: Device that requests the nvmem device. + * @id: name id for the requested nvmem device. + * +- * Return: ERR_PTR() on error or a valid pointer to a struct nvmem_cell +- * on success. The nvmem_cell will be freed by the automatically once the ++ * Return: ERR_PTR() on error or a valid pointer to a struct nvmem_device ++ * on success. The nvmem_device will be freed by the automatically once the + * device is freed. + */ + struct nvmem_device *devm_nvmem_device_get(struct device *dev, const char *id) diff --git a/target/linux/generic/backport-6.1/840-v6.11-0001-nvmem-add-missing-MODULE_DESCRIPTION-macros.patch b/target/linux/generic/backport-6.1/840-v6.11-0001-nvmem-add-missing-MODULE_DESCRIPTION-macros.patch new file mode 100644 index 0000000000..a8ce832408 --- /dev/null +++ b/target/linux/generic/backport-6.1/840-v6.11-0001-nvmem-add-missing-MODULE_DESCRIPTION-macros.patch @@ -0,0 +1,48 @@ +From c553bad4c5fc5ae44bd2fcaa73e1d6bedfb1c35c Mon Sep 17 00:00:00 2001 +From: Jeff Johnson +Date: Fri, 5 Jul 2024 08:48:38 +0100 +Subject: [PATCH] nvmem: add missing MODULE_DESCRIPTION() macros + +make allmodconfig && make W=1 C=1 reports: +WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/nvmem/nvmem-apple-efuses.o +WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/nvmem/nvmem_brcm_nvram.o +WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/nvmem/nvmem_u-boot-env.o + +Add the missing invocations of the MODULE_DESCRIPTION() macro. + +Signed-off-by: Jeff Johnson +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-2-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/apple-efuses.c | 1 + + drivers/nvmem/brcm_nvram.c | 1 + + drivers/nvmem/u-boot-env.c | 1 + + 3 files changed, 3 insertions(+) + +--- a/drivers/nvmem/apple-efuses.c ++++ b/drivers/nvmem/apple-efuses.c +@@ -78,4 +78,5 @@ static struct platform_driver apple_efus + module_platform_driver(apple_efuses_driver); + + MODULE_AUTHOR("Sven Peter "); ++MODULE_DESCRIPTION("Apple SoC eFuse driver"); + MODULE_LICENSE("GPL"); +--- a/drivers/nvmem/brcm_nvram.c ++++ b/drivers/nvmem/brcm_nvram.c +@@ -253,5 +253,6 @@ static int __init brcm_nvram_init(void) + subsys_initcall_sync(brcm_nvram_init); + + MODULE_AUTHOR("Rafał Miłecki"); ++MODULE_DESCRIPTION("Broadcom I/O-mapped NVRAM support driver"); + MODULE_LICENSE("GPL"); + MODULE_DEVICE_TABLE(of, brcm_nvram_of_match_table); +--- a/drivers/nvmem/u-boot-env.c ++++ b/drivers/nvmem/u-boot-env.c +@@ -249,5 +249,6 @@ static struct platform_driver u_boot_env + module_platform_driver(u_boot_env_driver); + + MODULE_AUTHOR("Rafał Miłecki"); ++MODULE_DESCRIPTION("U-Boot environment variables support module"); + MODULE_LICENSE("GPL"); + MODULE_DEVICE_TABLE(of, u_boot_env_of_match_table); diff --git a/target/linux/generic/backport-6.1/840-v6.11-0002-nvmem-meson-efuse-Replacing-the-use-of-of_node_put-t.patch b/target/linux/generic/backport-6.1/840-v6.11-0002-nvmem-meson-efuse-Replacing-the-use-of-of_node_put-t.patch new file mode 100644 index 0000000000..05c82dbf6f --- /dev/null +++ b/target/linux/generic/backport-6.1/840-v6.11-0002-nvmem-meson-efuse-Replacing-the-use-of-of_node_put-t.patch @@ -0,0 +1,48 @@ +From 5fecb932607d83d37a703c731268e9d9051457f5 Mon Sep 17 00:00:00 2001 +From: MarileneGarcia +Date: Fri, 5 Jul 2024 08:48:40 +0100 +Subject: [PATCH] nvmem: meson-efuse: Replacing the use of of_node_put to + __free + +Use __free for device_node values, and thus drop calls to +of_node_put. + +The goal is to reduce memory management issues by using this +scope-based of_node_put() cleanup to simplify function exit +handling. When using __free a resource is allocated within a +block, it is automatically freed at the end of the block. + +Suggested-by: Julia Lawall +Signed-off-by: MarileneGarcia +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-4-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/meson-efuse.c | 5 ++--- + 1 file changed, 2 insertions(+), 3 deletions(-) + +--- a/drivers/nvmem/meson-efuse.c ++++ b/drivers/nvmem/meson-efuse.c +@@ -48,20 +48,19 @@ static int meson_efuse_probe(struct plat + { + struct device *dev = &pdev->dev; + struct meson_sm_firmware *fw; +- struct device_node *sm_np; + struct nvmem_device *nvmem; + struct nvmem_config *econfig; + struct clk *clk; + unsigned int size; ++ struct device_node *sm_np __free(device_node) = ++ of_parse_phandle(pdev->dev.of_node, "secure-monitor", 0); + +- sm_np = of_parse_phandle(pdev->dev.of_node, "secure-monitor", 0); + if (!sm_np) { + dev_err(&pdev->dev, "no secure-monitor node\n"); + return -ENODEV; + } + + fw = meson_sm_get(sm_np); +- of_node_put(sm_np); + if (!fw) + return -EPROBE_DEFER; + diff --git a/target/linux/generic/backport-6.1/840-v6.11-0003-nvmem-rockchip-otp-set-add_legacy_fixed_of_cells-con.patch b/target/linux/generic/backport-6.1/840-v6.11-0003-nvmem-rockchip-otp-set-add_legacy_fixed_of_cells-con.patch new file mode 100644 index 0000000000..a8a30fc810 --- /dev/null +++ b/target/linux/generic/backport-6.1/840-v6.11-0003-nvmem-rockchip-otp-set-add_legacy_fixed_of_cells-con.patch @@ -0,0 +1,28 @@ +From 2933e79db3c00a8cdc56f6bb050a857fec1875ad Mon Sep 17 00:00:00 2001 +From: Heiko Stuebner +Date: Fri, 5 Jul 2024 08:48:41 +0100 +Subject: [PATCH] nvmem: rockchip-otp: set add_legacy_fixed_of_cells config + option + +The Rockchip OTP describes its layout via devicetree subnodes, +so set the appropriate property. + +Fixes: 2cc3b37f5b6d ("nvmem: add explicit config option to read old syntax fixed OF cells") +Signed-off-by: Heiko Stuebner +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-5-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/rockchip-otp.c | 1 + + 1 file changed, 1 insertion(+) + +--- a/drivers/nvmem/rockchip-otp.c ++++ b/drivers/nvmem/rockchip-otp.c +@@ -255,6 +255,7 @@ static int rockchip_otp_read(void *conte + static struct nvmem_config otp_config = { + .name = "rockchip-otp", + .owner = THIS_MODULE, ++ .add_legacy_fixed_of_cells = true, + .read_only = true, + .stride = 1, + .word_size = 1, diff --git a/target/linux/generic/backport-6.1/840-v6.11-0004-nvmem-rockchip-otp-Set-type-to-OTP.patch b/target/linux/generic/backport-6.1/840-v6.11-0004-nvmem-rockchip-otp-Set-type-to-OTP.patch new file mode 100644 index 0000000000..8491eb3c9c --- /dev/null +++ b/target/linux/generic/backport-6.1/840-v6.11-0004-nvmem-rockchip-otp-Set-type-to-OTP.patch @@ -0,0 +1,25 @@ +From 39f95600d8c53355b212a117e91a6ba15e0cac47 Mon Sep 17 00:00:00 2001 +From: Heiko Stuebner +Date: Fri, 5 Jul 2024 08:48:42 +0100 +Subject: [PATCH] nvmem: rockchip-otp: Set type to OTP + +The Rockchip OTP is obviously an OTP memory, so document this fact. + +Signed-off-by: Heiko Stuebner +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-6-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/rockchip-otp.c | 1 + + 1 file changed, 1 insertion(+) + +--- a/drivers/nvmem/rockchip-otp.c ++++ b/drivers/nvmem/rockchip-otp.c +@@ -256,6 +256,7 @@ static struct nvmem_config otp_config = + .name = "rockchip-otp", + .owner = THIS_MODULE, + .add_legacy_fixed_of_cells = true, ++ .type = NVMEM_TYPE_OTP, + .read_only = true, + .stride = 1, + .word_size = 1, diff --git a/target/linux/generic/backport-6.1/840-v6.11-0005-nvmem-rockchip-efuse-set-type-to-OTP.patch b/target/linux/generic/backport-6.1/840-v6.11-0005-nvmem-rockchip-efuse-set-type-to-OTP.patch new file mode 100644 index 0000000000..260b03eb03 --- /dev/null +++ b/target/linux/generic/backport-6.1/840-v6.11-0005-nvmem-rockchip-efuse-set-type-to-OTP.patch @@ -0,0 +1,26 @@ +From ba64a04474d2989f397982c48e405cfd785e2dd5 Mon Sep 17 00:00:00 2001 +From: Heiko Stuebner +Date: Fri, 5 Jul 2024 08:48:43 +0100 +Subject: [PATCH] nvmem: rockchip-efuse: set type to OTP + +This device currently reports an "Unknown" type in sysfs. +Since it is an eFuse hardware device, set its type to OTP. + +Signed-off-by: Heiko Stuebner +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-7-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/rockchip-efuse.c | 1 + + 1 file changed, 1 insertion(+) + +--- a/drivers/nvmem/rockchip-efuse.c ++++ b/drivers/nvmem/rockchip-efuse.c +@@ -206,6 +206,7 @@ static int rockchip_rk3399_efuse_read(vo + static struct nvmem_config econfig = { + .name = "rockchip-efuse", + .add_legacy_fixed_of_cells = true, ++ .type = NVMEM_TYPE_OTP, + .stride = 1, + .word_size = 1, + .read_only = true, diff --git a/target/linux/generic/backport-6.1/840-v6.11-0006-nvmem-core-add-single-sysfs-group.patch b/target/linux/generic/backport-6.1/840-v6.11-0006-nvmem-core-add-single-sysfs-group.patch new file mode 100644 index 0000000000..4fb2afd2fa --- /dev/null +++ b/target/linux/generic/backport-6.1/840-v6.11-0006-nvmem-core-add-single-sysfs-group.patch @@ -0,0 +1,42 @@ +From 6188f233161c6a5b2d1c396a221dfafc77dc9eec Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= +Date: Fri, 5 Jul 2024 08:48:46 +0100 +Subject: [PATCH] nvmem: core: add single sysfs group +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +The sysfs core provides a function to easily register a single group. +Use it and remove the now unnecessary nvmem_cells_groups array. + +Signed-off-by: Thomas Weißschuh +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-10-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/core.c | 7 +------ + 1 file changed, 1 insertion(+), 6 deletions(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -368,11 +368,6 @@ static const struct attribute_group *nvm + NULL, + }; + +-static const struct attribute_group *nvmem_cells_groups[] = { +- &nvmem_cells_group, +- NULL, +-}; +- + static struct bin_attribute bin_attr_nvmem_eeprom_compat = { + .attr = { + .name = "eeprom", +@@ -477,7 +472,7 @@ static int nvmem_populate_sysfs_cells(st + + nvmem_cells_group.bin_attrs = cells_attrs; + +- ret = device_add_groups(&nvmem->dev, nvmem_cells_groups); ++ ret = device_add_group(&nvmem->dev, &nvmem_cells_group); + if (ret) + goto unlock_mutex; + diff --git a/target/linux/generic/backport-6.1/840-v6.11-0007-nvmem-core-remove-global-nvmem_cells_group.patch b/target/linux/generic/backport-6.1/840-v6.11-0007-nvmem-core-remove-global-nvmem_cells_group.patch new file mode 100644 index 0000000000..ef626d37a0 --- /dev/null +++ b/target/linux/generic/backport-6.1/840-v6.11-0007-nvmem-core-remove-global-nvmem_cells_group.patch @@ -0,0 +1,83 @@ +From 6839fed062b7898665983368c88269a6fb1fc10f Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= +Date: Fri, 5 Jul 2024 08:48:47 +0100 +Subject: [PATCH] nvmem: core: remove global nvmem_cells_group +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +nvmem_cells_groups is a global variable that is also mutated. +This is complicated and error-prone. + +Instead use a normal stack variable. + +Signed-off-by: Thomas Weißschuh +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-11-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/core.c | 26 ++++++++++---------------- + 1 file changed, 10 insertions(+), 16 deletions(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -358,11 +358,6 @@ static const struct attribute_group nvme + .is_bin_visible = nvmem_bin_attr_is_visible, + }; + +-/* Cell attributes will be dynamically allocated */ +-static struct attribute_group nvmem_cells_group = { +- .name = "cells", +-}; +- + static const struct attribute_group *nvmem_dev_groups[] = { + &nvmem_bin_group, + NULL, +@@ -424,23 +419,24 @@ static void nvmem_sysfs_remove_compat(st + + static int nvmem_populate_sysfs_cells(struct nvmem_device *nvmem) + { +- struct bin_attribute **cells_attrs, *attrs; ++ struct attribute_group group = { ++ .name = "cells", ++ }; + struct nvmem_cell_entry *entry; ++ struct bin_attribute *attrs; + unsigned int ncells = 0, i = 0; + int ret = 0; + + mutex_lock(&nvmem_mutex); + +- if (list_empty(&nvmem->cells) || nvmem->sysfs_cells_populated) { +- nvmem_cells_group.bin_attrs = NULL; ++ if (list_empty(&nvmem->cells) || nvmem->sysfs_cells_populated) + goto unlock_mutex; +- } + + /* Allocate an array of attributes with a sentinel */ + ncells = list_count_nodes(&nvmem->cells); +- cells_attrs = devm_kcalloc(&nvmem->dev, ncells + 1, +- sizeof(struct bin_attribute *), GFP_KERNEL); +- if (!cells_attrs) { ++ group.bin_attrs = devm_kcalloc(&nvmem->dev, ncells + 1, ++ sizeof(struct bin_attribute *), GFP_KERNEL); ++ if (!group.bin_attrs) { + ret = -ENOMEM; + goto unlock_mutex; + } +@@ -466,13 +462,11 @@ static int nvmem_populate_sysfs_cells(st + goto unlock_mutex; + } + +- cells_attrs[i] = &attrs[i]; ++ group.bin_attrs[i] = &attrs[i]; + i++; + } + +- nvmem_cells_group.bin_attrs = cells_attrs; +- +- ret = device_add_group(&nvmem->dev, &nvmem_cells_group); ++ ret = device_add_group(&nvmem->dev, &group); + if (ret) + goto unlock_mutex; + diff --git a/target/linux/generic/backport-6.1/840-v6.11-0008-nvmem-core-drop-unnecessary-range-checks-in-sysfs-ca.patch b/target/linux/generic/backport-6.1/840-v6.11-0008-nvmem-core-drop-unnecessary-range-checks-in-sysfs-ca.patch new file mode 100644 index 0000000000..9b6251b919 --- /dev/null +++ b/target/linux/generic/backport-6.1/840-v6.11-0008-nvmem-core-drop-unnecessary-range-checks-in-sysfs-ca.patch @@ -0,0 +1,61 @@ +From 588773802c386d38f9c4e91acd47369e89d95a30 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= +Date: Fri, 5 Jul 2024 08:48:48 +0100 +Subject: [PATCH] nvmem: core: drop unnecessary range checks in sysfs callbacks +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +The same checks have already been done in sysfs_kf_bin_write() and +sysfs_kf_bin_read() just before the callbacks are invoked. + +Signed-off-by: Thomas Weißschuh +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-12-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/core.c | 14 -------------- + 1 file changed, 14 deletions(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -204,19 +204,12 @@ static ssize_t bin_attr_nvmem_read(struc + dev = kobj_to_dev(kobj); + nvmem = to_nvmem_device(dev); + +- /* Stop the user from reading */ +- if (pos >= nvmem->size) +- return 0; +- + if (!IS_ALIGNED(pos, nvmem->stride)) + return -EINVAL; + + if (count < nvmem->word_size) + return -EINVAL; + +- if (pos + count > nvmem->size) +- count = nvmem->size - pos; +- + count = round_down(count, nvmem->word_size); + + if (!nvmem->reg_read) +@@ -244,19 +237,12 @@ static ssize_t bin_attr_nvmem_write(stru + dev = kobj_to_dev(kobj); + nvmem = to_nvmem_device(dev); + +- /* Stop the user from writing */ +- if (pos >= nvmem->size) +- return -EFBIG; +- + if (!IS_ALIGNED(pos, nvmem->stride)) + return -EINVAL; + + if (count < nvmem->word_size) + return -EINVAL; + +- if (pos + count > nvmem->size) +- count = nvmem->size - pos; +- + count = round_down(count, nvmem->word_size); + + if (!nvmem->reg_write) diff --git a/target/linux/generic/backport-6.1/840-v6.11-0009-nvmem-Use-sysfs_emit-for-type-attribute.patch b/target/linux/generic/backport-6.1/840-v6.11-0009-nvmem-Use-sysfs_emit-for-type-attribute.patch new file mode 100644 index 0000000000..3da1febaf1 --- /dev/null +++ b/target/linux/generic/backport-6.1/840-v6.11-0009-nvmem-Use-sysfs_emit-for-type-attribute.patch @@ -0,0 +1,30 @@ +From 08c367e45b6d322956878774f0b88bf5e52c6d54 Mon Sep 17 00:00:00 2001 +From: Marek Vasut +Date: Fri, 5 Jul 2024 08:48:51 +0100 +Subject: [PATCH] nvmem: Use sysfs_emit() for type attribute + +Use sysfs_emit() instead of sprintf() to follow best practice per +Documentation/filesystems/sysfs.rst +" +show() should only use sysfs_emit()... +" + +Signed-off-by: Marek Vasut +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-15-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/core.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -180,7 +180,7 @@ static ssize_t type_show(struct device * + { + struct nvmem_device *nvmem = to_nvmem_device(dev); + +- return sprintf(buf, "%s\n", nvmem_type_str[nvmem->type]); ++ return sysfs_emit(buf, "%s\n", nvmem_type_str[nvmem->type]); + } + + static DEVICE_ATTR_RO(type); diff --git a/target/linux/generic/backport-6.1/840-v6.11-0010-nvmem-core-Implement-force_ro-sysfs-attribute.patch b/target/linux/generic/backport-6.1/840-v6.11-0010-nvmem-core-Implement-force_ro-sysfs-attribute.patch new file mode 100644 index 0000000000..ac7dda1bdf --- /dev/null +++ b/target/linux/generic/backport-6.1/840-v6.11-0010-nvmem-core-Implement-force_ro-sysfs-attribute.patch @@ -0,0 +1,122 @@ +From 9d7eb234ac7a56b88aea8a52ed81553a730fe25c Mon Sep 17 00:00:00 2001 +From: Marek Vasut +Date: Fri, 5 Jul 2024 08:48:52 +0100 +Subject: [PATCH] nvmem: core: Implement force_ro sysfs attribute + +Implement "force_ro" sysfs attribute to allow users to set read-write +devices as read-only and back to read-write from userspace. The choice +of the name is based on MMC core 'force_ro' attribute. + +This solves a situation where an AT24 I2C EEPROM with GPIO based nWP +signal may have to be occasionally updated. Such I2C EEPROM device is +usually set as read-only during most of the regular system operation, +but in case it has to be updated in a controlled manner, it could be +unlocked using this new "force_ro" sysfs attribute and then re-locked +again. + +The "read-only" DT property and config->read_only configuration is +respected and is used to set default state of the device, read-only +or read-write, for devices which do implement .reg_write function. +For devices which do not implement .reg_write function, the device +is unconditionally read-only and the "force_ro" attribute is not +visible. + +Signed-off-by: Marek Vasut +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-16-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + Documentation/ABI/stable/sysfs-bus-nvmem | 17 ++++++++++ + drivers/nvmem/core.c | 43 ++++++++++++++++++++++++ + 2 files changed, 60 insertions(+) + +--- a/Documentation/ABI/stable/sysfs-bus-nvmem ++++ b/Documentation/ABI/stable/sysfs-bus-nvmem +@@ -1,3 +1,20 @@ ++What: /sys/bus/nvmem/devices/.../force_ro ++Date: June 2024 ++KernelVersion: 6.11 ++Contact: Marek Vasut ++Description: ++ This read/write attribute allows users to set read-write ++ devices as read-only and back to read-write from userspace. ++ This can be used to unlock and relock write-protection of ++ devices which are generally locked, except during sporadic ++ programming operation. ++ Read returns '0' or '1' for read-write or read-only modes ++ respectively. ++ Write parses one of 'YyTt1NnFf0', or [oO][NnFf] for "on" ++ and "off", i.e. what kstrbool() supports. ++ Note: This file is only present if CONFIG_NVMEM_SYSFS ++ is enabled. ++ + What: /sys/bus/nvmem/devices/.../nvmem + Date: July 2015 + KernelVersion: 4.2 +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -185,7 +185,30 @@ static ssize_t type_show(struct device * + + static DEVICE_ATTR_RO(type); + ++static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr, ++ char *buf) ++{ ++ struct nvmem_device *nvmem = to_nvmem_device(dev); ++ ++ return sysfs_emit(buf, "%d\n", nvmem->read_only); ++} ++ ++static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr, ++ const char *buf, size_t count) ++{ ++ struct nvmem_device *nvmem = to_nvmem_device(dev); ++ int ret = kstrtobool(buf, &nvmem->read_only); ++ ++ if (ret < 0) ++ return ret; ++ ++ return count; ++} ++ ++static DEVICE_ATTR_RW(force_ro); ++ + static struct attribute *nvmem_attrs[] = { ++ &dev_attr_force_ro.attr, + &dev_attr_type.attr, + NULL, + }; +@@ -286,6 +309,25 @@ static umode_t nvmem_bin_attr_is_visible + return nvmem_bin_attr_get_umode(nvmem); + } + ++static umode_t nvmem_attr_is_visible(struct kobject *kobj, ++ struct attribute *attr, int i) ++{ ++ struct device *dev = kobj_to_dev(kobj); ++ struct nvmem_device *nvmem = to_nvmem_device(dev); ++ ++ /* ++ * If the device has no .reg_write operation, do not allow ++ * configuration as read-write. ++ * If the device is set as read-only by configuration, it ++ * can be forced into read-write mode using the 'force_ro' ++ * attribute. ++ */ ++ if (attr == &dev_attr_force_ro.attr && !nvmem->reg_write) ++ return 0; /* Attribute not visible */ ++ ++ return attr->mode; ++} ++ + static struct nvmem_cell *nvmem_create_cell(struct nvmem_cell_entry *entry, + const char *id, int index); + +@@ -342,6 +384,7 @@ static const struct attribute_group nvme + .bin_attrs = nvmem_bin_attributes, + .attrs = nvmem_attrs, + .is_bin_visible = nvmem_bin_attr_is_visible, ++ .is_visible = nvmem_attr_is_visible, + }; + + static const struct attribute_group *nvmem_dev_groups[] = { diff --git a/target/linux/generic/backport-6.1/840-v6.11-0011-nvmem-u-boot-env-error-if-NVMEM-device-is-too-small.patch b/target/linux/generic/backport-6.1/840-v6.11-0011-nvmem-u-boot-env-error-if-NVMEM-device-is-too-small.patch new file mode 100644 index 0000000000..70d420f205 --- /dev/null +++ b/target/linux/generic/backport-6.1/840-v6.11-0011-nvmem-u-boot-env-error-if-NVMEM-device-is-too-small.patch @@ -0,0 +1,40 @@ +From 8679e8b4a1ebdb40c4429e49368d29353e07b601 Mon Sep 17 00:00:00 2001 +From: John Thomson +Date: Mon, 2 Sep 2024 15:25:08 +0100 +Subject: [PATCH] nvmem: u-boot-env: error if NVMEM device is too small +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Verify data size before trying to parse it to avoid reading out of +buffer. This could happen in case of problems at MTD level or invalid DT +bindings. + +Signed-off-by: John Thomson +Cc: stable +Fixes: d5542923f200 ("nvmem: add driver handling U-Boot environment variables") +[rmilecki: simplify commit description & rebase] +Signed-off-by: Rafał Miłecki +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240902142510.71096-2-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/u-boot-env.c | 7 +++++++ + 1 file changed, 7 insertions(+) + +--- a/drivers/nvmem/u-boot-env.c ++++ b/drivers/nvmem/u-boot-env.c +@@ -176,6 +176,13 @@ static int u_boot_env_parse(struct u_boo + data_offset = offsetof(struct u_boot_env_image_broadcom, data); + break; + } ++ ++ if (dev_size < data_offset) { ++ dev_err(dev, "Device too small for u-boot-env\n"); ++ err = -EIO; ++ goto err_kfree; ++ } ++ + crc32_addr = (__le32 *)(buf + crc32_offset); + crc32 = le32_to_cpu(*crc32_addr); + crc32_data_len = dev_size - crc32_data_offset; diff --git a/target/linux/generic/backport-6.1/840-v6.11-0012-nvmem-Fix-return-type-of-devm_nvmem_device_get-in-ke.patch b/target/linux/generic/backport-6.1/840-v6.11-0012-nvmem-Fix-return-type-of-devm_nvmem_device_get-in-ke.patch new file mode 100644 index 0000000000..08f6278849 --- /dev/null +++ b/target/linux/generic/backport-6.1/840-v6.11-0012-nvmem-Fix-return-type-of-devm_nvmem_device_get-in-ke.patch @@ -0,0 +1,37 @@ +From c69f37f6559a8948d70badd2b179db7714dedd62 Mon Sep 17 00:00:00 2001 +From: Geert Uytterhoeven +Date: Mon, 2 Sep 2024 15:25:09 +0100 +Subject: [PATCH] nvmem: Fix return type of devm_nvmem_device_get() in + kerneldoc + +devm_nvmem_device_get() returns an nvmem device, not an nvmem cell. + +Fixes: e2a5402ec7c6d044 ("nvmem: Add nvmem_device based consumer apis.") +Cc: stable +Signed-off-by: Geert Uytterhoeven +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240902142510.71096-3-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/core.c | 6 +++--- + 1 file changed, 3 insertions(+), 3 deletions(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -1276,13 +1276,13 @@ void nvmem_device_put(struct nvmem_devic + EXPORT_SYMBOL_GPL(nvmem_device_put); + + /** +- * devm_nvmem_device_get() - Get nvmem cell of device form a given id ++ * devm_nvmem_device_get() - Get nvmem device of device form a given id + * + * @dev: Device that requests the nvmem device. + * @id: name id for the requested nvmem device. + * +- * Return: ERR_PTR() on error or a valid pointer to a struct nvmem_cell +- * on success. The nvmem_cell will be freed by the automatically once the ++ * Return: ERR_PTR() on error or a valid pointer to a struct nvmem_device ++ * on success. The nvmem_device will be freed by the automatically once the + * device is freed. + */ + struct nvmem_device *devm_nvmem_device_get(struct device *dev, const char *id) diff --git a/target/linux/generic/backport-6.6/822-v6.11-0001-nvmem-add-missing-MODULE_DESCRIPTION-macros.patch b/target/linux/generic/backport-6.6/822-v6.11-0001-nvmem-add-missing-MODULE_DESCRIPTION-macros.patch new file mode 100644 index 0000000000..a8ce832408 --- /dev/null +++ b/target/linux/generic/backport-6.6/822-v6.11-0001-nvmem-add-missing-MODULE_DESCRIPTION-macros.patch @@ -0,0 +1,48 @@ +From c553bad4c5fc5ae44bd2fcaa73e1d6bedfb1c35c Mon Sep 17 00:00:00 2001 +From: Jeff Johnson +Date: Fri, 5 Jul 2024 08:48:38 +0100 +Subject: [PATCH] nvmem: add missing MODULE_DESCRIPTION() macros + +make allmodconfig && make W=1 C=1 reports: +WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/nvmem/nvmem-apple-efuses.o +WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/nvmem/nvmem_brcm_nvram.o +WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/nvmem/nvmem_u-boot-env.o + +Add the missing invocations of the MODULE_DESCRIPTION() macro. + +Signed-off-by: Jeff Johnson +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-2-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/apple-efuses.c | 1 + + drivers/nvmem/brcm_nvram.c | 1 + + drivers/nvmem/u-boot-env.c | 1 + + 3 files changed, 3 insertions(+) + +--- a/drivers/nvmem/apple-efuses.c ++++ b/drivers/nvmem/apple-efuses.c +@@ -78,4 +78,5 @@ static struct platform_driver apple_efus + module_platform_driver(apple_efuses_driver); + + MODULE_AUTHOR("Sven Peter "); ++MODULE_DESCRIPTION("Apple SoC eFuse driver"); + MODULE_LICENSE("GPL"); +--- a/drivers/nvmem/brcm_nvram.c ++++ b/drivers/nvmem/brcm_nvram.c +@@ -253,5 +253,6 @@ static int __init brcm_nvram_init(void) + subsys_initcall_sync(brcm_nvram_init); + + MODULE_AUTHOR("Rafał Miłecki"); ++MODULE_DESCRIPTION("Broadcom I/O-mapped NVRAM support driver"); + MODULE_LICENSE("GPL"); + MODULE_DEVICE_TABLE(of, brcm_nvram_of_match_table); +--- a/drivers/nvmem/u-boot-env.c ++++ b/drivers/nvmem/u-boot-env.c +@@ -249,5 +249,6 @@ static struct platform_driver u_boot_env + module_platform_driver(u_boot_env_driver); + + MODULE_AUTHOR("Rafał Miłecki"); ++MODULE_DESCRIPTION("U-Boot environment variables support module"); + MODULE_LICENSE("GPL"); + MODULE_DEVICE_TABLE(of, u_boot_env_of_match_table); diff --git a/target/linux/generic/backport-6.6/822-v6.11-0002-nvmem-meson-efuse-Replacing-the-use-of-of_node_put-t.patch b/target/linux/generic/backport-6.6/822-v6.11-0002-nvmem-meson-efuse-Replacing-the-use-of-of_node_put-t.patch new file mode 100644 index 0000000000..05c82dbf6f --- /dev/null +++ b/target/linux/generic/backport-6.6/822-v6.11-0002-nvmem-meson-efuse-Replacing-the-use-of-of_node_put-t.patch @@ -0,0 +1,48 @@ +From 5fecb932607d83d37a703c731268e9d9051457f5 Mon Sep 17 00:00:00 2001 +From: MarileneGarcia +Date: Fri, 5 Jul 2024 08:48:40 +0100 +Subject: [PATCH] nvmem: meson-efuse: Replacing the use of of_node_put to + __free + +Use __free for device_node values, and thus drop calls to +of_node_put. + +The goal is to reduce memory management issues by using this +scope-based of_node_put() cleanup to simplify function exit +handling. When using __free a resource is allocated within a +block, it is automatically freed at the end of the block. + +Suggested-by: Julia Lawall +Signed-off-by: MarileneGarcia +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-4-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/meson-efuse.c | 5 ++--- + 1 file changed, 2 insertions(+), 3 deletions(-) + +--- a/drivers/nvmem/meson-efuse.c ++++ b/drivers/nvmem/meson-efuse.c +@@ -48,20 +48,19 @@ static int meson_efuse_probe(struct plat + { + struct device *dev = &pdev->dev; + struct meson_sm_firmware *fw; +- struct device_node *sm_np; + struct nvmem_device *nvmem; + struct nvmem_config *econfig; + struct clk *clk; + unsigned int size; ++ struct device_node *sm_np __free(device_node) = ++ of_parse_phandle(pdev->dev.of_node, "secure-monitor", 0); + +- sm_np = of_parse_phandle(pdev->dev.of_node, "secure-monitor", 0); + if (!sm_np) { + dev_err(&pdev->dev, "no secure-monitor node\n"); + return -ENODEV; + } + + fw = meson_sm_get(sm_np); +- of_node_put(sm_np); + if (!fw) + return -EPROBE_DEFER; + diff --git a/target/linux/generic/backport-6.6/822-v6.11-0004-nvmem-rockchip-otp-Set-type-to-OTP.patch b/target/linux/generic/backport-6.6/822-v6.11-0004-nvmem-rockchip-otp-Set-type-to-OTP.patch new file mode 100644 index 0000000000..8491eb3c9c --- /dev/null +++ b/target/linux/generic/backport-6.6/822-v6.11-0004-nvmem-rockchip-otp-Set-type-to-OTP.patch @@ -0,0 +1,25 @@ +From 39f95600d8c53355b212a117e91a6ba15e0cac47 Mon Sep 17 00:00:00 2001 +From: Heiko Stuebner +Date: Fri, 5 Jul 2024 08:48:42 +0100 +Subject: [PATCH] nvmem: rockchip-otp: Set type to OTP + +The Rockchip OTP is obviously an OTP memory, so document this fact. + +Signed-off-by: Heiko Stuebner +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-6-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/rockchip-otp.c | 1 + + 1 file changed, 1 insertion(+) + +--- a/drivers/nvmem/rockchip-otp.c ++++ b/drivers/nvmem/rockchip-otp.c +@@ -256,6 +256,7 @@ static struct nvmem_config otp_config = + .name = "rockchip-otp", + .owner = THIS_MODULE, + .add_legacy_fixed_of_cells = true, ++ .type = NVMEM_TYPE_OTP, + .read_only = true, + .stride = 1, + .word_size = 1, diff --git a/target/linux/generic/backport-6.6/822-v6.11-0005-nvmem-rockchip-efuse-set-type-to-OTP.patch b/target/linux/generic/backport-6.6/822-v6.11-0005-nvmem-rockchip-efuse-set-type-to-OTP.patch new file mode 100644 index 0000000000..260b03eb03 --- /dev/null +++ b/target/linux/generic/backport-6.6/822-v6.11-0005-nvmem-rockchip-efuse-set-type-to-OTP.patch @@ -0,0 +1,26 @@ +From ba64a04474d2989f397982c48e405cfd785e2dd5 Mon Sep 17 00:00:00 2001 +From: Heiko Stuebner +Date: Fri, 5 Jul 2024 08:48:43 +0100 +Subject: [PATCH] nvmem: rockchip-efuse: set type to OTP + +This device currently reports an "Unknown" type in sysfs. +Since it is an eFuse hardware device, set its type to OTP. + +Signed-off-by: Heiko Stuebner +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-7-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/rockchip-efuse.c | 1 + + 1 file changed, 1 insertion(+) + +--- a/drivers/nvmem/rockchip-efuse.c ++++ b/drivers/nvmem/rockchip-efuse.c +@@ -206,6 +206,7 @@ static int rockchip_rk3399_efuse_read(vo + static struct nvmem_config econfig = { + .name = "rockchip-efuse", + .add_legacy_fixed_of_cells = true, ++ .type = NVMEM_TYPE_OTP, + .stride = 1, + .word_size = 1, + .read_only = true, diff --git a/target/linux/generic/backport-6.6/822-v6.11-0006-nvmem-core-add-single-sysfs-group.patch b/target/linux/generic/backport-6.6/822-v6.11-0006-nvmem-core-add-single-sysfs-group.patch new file mode 100644 index 0000000000..eae06b2404 --- /dev/null +++ b/target/linux/generic/backport-6.6/822-v6.11-0006-nvmem-core-add-single-sysfs-group.patch @@ -0,0 +1,42 @@ +From 6188f233161c6a5b2d1c396a221dfafc77dc9eec Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= +Date: Fri, 5 Jul 2024 08:48:46 +0100 +Subject: [PATCH] nvmem: core: add single sysfs group +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +The sysfs core provides a function to easily register a single group. +Use it and remove the now unnecessary nvmem_cells_groups array. + +Signed-off-by: Thomas Weißschuh +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-10-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/core.c | 7 +------ + 1 file changed, 1 insertion(+), 6 deletions(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -367,11 +367,6 @@ static const struct attribute_group *nvm + NULL, + }; + +-static const struct attribute_group *nvmem_cells_groups[] = { +- &nvmem_cells_group, +- NULL, +-}; +- + static struct bin_attribute bin_attr_nvmem_eeprom_compat = { + .attr = { + .name = "eeprom", +@@ -476,7 +471,7 @@ static int nvmem_populate_sysfs_cells(st + + nvmem_cells_group.bin_attrs = cells_attrs; + +- ret = device_add_groups(&nvmem->dev, nvmem_cells_groups); ++ ret = device_add_group(&nvmem->dev, &nvmem_cells_group); + if (ret) + goto unlock_mutex; + diff --git a/target/linux/generic/backport-6.6/822-v6.11-0007-nvmem-core-remove-global-nvmem_cells_group.patch b/target/linux/generic/backport-6.6/822-v6.11-0007-nvmem-core-remove-global-nvmem_cells_group.patch new file mode 100644 index 0000000000..9ec523c3b0 --- /dev/null +++ b/target/linux/generic/backport-6.6/822-v6.11-0007-nvmem-core-remove-global-nvmem_cells_group.patch @@ -0,0 +1,83 @@ +From 6839fed062b7898665983368c88269a6fb1fc10f Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= +Date: Fri, 5 Jul 2024 08:48:47 +0100 +Subject: [PATCH] nvmem: core: remove global nvmem_cells_group +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +nvmem_cells_groups is a global variable that is also mutated. +This is complicated and error-prone. + +Instead use a normal stack variable. + +Signed-off-by: Thomas Weißschuh +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-11-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/core.c | 26 ++++++++++---------------- + 1 file changed, 10 insertions(+), 16 deletions(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -357,11 +357,6 @@ static const struct attribute_group nvme + .is_bin_visible = nvmem_bin_attr_is_visible, + }; + +-/* Cell attributes will be dynamically allocated */ +-static struct attribute_group nvmem_cells_group = { +- .name = "cells", +-}; +- + static const struct attribute_group *nvmem_dev_groups[] = { + &nvmem_bin_group, + NULL, +@@ -423,23 +418,24 @@ static void nvmem_sysfs_remove_compat(st + + static int nvmem_populate_sysfs_cells(struct nvmem_device *nvmem) + { +- struct bin_attribute **cells_attrs, *attrs; ++ struct attribute_group group = { ++ .name = "cells", ++ }; + struct nvmem_cell_entry *entry; ++ struct bin_attribute *attrs; + unsigned int ncells = 0, i = 0; + int ret = 0; + + mutex_lock(&nvmem_mutex); + +- if (list_empty(&nvmem->cells) || nvmem->sysfs_cells_populated) { +- nvmem_cells_group.bin_attrs = NULL; ++ if (list_empty(&nvmem->cells) || nvmem->sysfs_cells_populated) + goto unlock_mutex; +- } + + /* Allocate an array of attributes with a sentinel */ + ncells = list_count_nodes(&nvmem->cells); +- cells_attrs = devm_kcalloc(&nvmem->dev, ncells + 1, +- sizeof(struct bin_attribute *), GFP_KERNEL); +- if (!cells_attrs) { ++ group.bin_attrs = devm_kcalloc(&nvmem->dev, ncells + 1, ++ sizeof(struct bin_attribute *), GFP_KERNEL); ++ if (!group.bin_attrs) { + ret = -ENOMEM; + goto unlock_mutex; + } +@@ -465,13 +461,11 @@ static int nvmem_populate_sysfs_cells(st + goto unlock_mutex; + } + +- cells_attrs[i] = &attrs[i]; ++ group.bin_attrs[i] = &attrs[i]; + i++; + } + +- nvmem_cells_group.bin_attrs = cells_attrs; +- +- ret = device_add_group(&nvmem->dev, &nvmem_cells_group); ++ ret = device_add_group(&nvmem->dev, &group); + if (ret) + goto unlock_mutex; + diff --git a/target/linux/generic/backport-6.6/822-v6.11-0008-nvmem-core-drop-unnecessary-range-checks-in-sysfs-ca.patch b/target/linux/generic/backport-6.6/822-v6.11-0008-nvmem-core-drop-unnecessary-range-checks-in-sysfs-ca.patch new file mode 100644 index 0000000000..22408e5295 --- /dev/null +++ b/target/linux/generic/backport-6.6/822-v6.11-0008-nvmem-core-drop-unnecessary-range-checks-in-sysfs-ca.patch @@ -0,0 +1,61 @@ +From 588773802c386d38f9c4e91acd47369e89d95a30 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= +Date: Fri, 5 Jul 2024 08:48:48 +0100 +Subject: [PATCH] nvmem: core: drop unnecessary range checks in sysfs callbacks +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +The same checks have already been done in sysfs_kf_bin_write() and +sysfs_kf_bin_read() just before the callbacks are invoked. + +Signed-off-by: Thomas Weißschuh +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-12-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/core.c | 14 -------------- + 1 file changed, 14 deletions(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -203,19 +203,12 @@ static ssize_t bin_attr_nvmem_read(struc + dev = kobj_to_dev(kobj); + nvmem = to_nvmem_device(dev); + +- /* Stop the user from reading */ +- if (pos >= nvmem->size) +- return 0; +- + if (!IS_ALIGNED(pos, nvmem->stride)) + return -EINVAL; + + if (count < nvmem->word_size) + return -EINVAL; + +- if (pos + count > nvmem->size) +- count = nvmem->size - pos; +- + count = round_down(count, nvmem->word_size); + + if (!nvmem->reg_read) +@@ -243,19 +236,12 @@ static ssize_t bin_attr_nvmem_write(stru + dev = kobj_to_dev(kobj); + nvmem = to_nvmem_device(dev); + +- /* Stop the user from writing */ +- if (pos >= nvmem->size) +- return -EFBIG; +- + if (!IS_ALIGNED(pos, nvmem->stride)) + return -EINVAL; + + if (count < nvmem->word_size) + return -EINVAL; + +- if (pos + count > nvmem->size) +- count = nvmem->size - pos; +- + count = round_down(count, nvmem->word_size); + + if (!nvmem->reg_write) diff --git a/target/linux/generic/backport-6.6/822-v6.11-0009-nvmem-Use-sysfs_emit-for-type-attribute.patch b/target/linux/generic/backport-6.6/822-v6.11-0009-nvmem-Use-sysfs_emit-for-type-attribute.patch new file mode 100644 index 0000000000..3159efbbe7 --- /dev/null +++ b/target/linux/generic/backport-6.6/822-v6.11-0009-nvmem-Use-sysfs_emit-for-type-attribute.patch @@ -0,0 +1,30 @@ +From 08c367e45b6d322956878774f0b88bf5e52c6d54 Mon Sep 17 00:00:00 2001 +From: Marek Vasut +Date: Fri, 5 Jul 2024 08:48:51 +0100 +Subject: [PATCH] nvmem: Use sysfs_emit() for type attribute + +Use sysfs_emit() instead of sprintf() to follow best practice per +Documentation/filesystems/sysfs.rst +" +show() should only use sysfs_emit()... +" + +Signed-off-by: Marek Vasut +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-15-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/core.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -179,7 +179,7 @@ static ssize_t type_show(struct device * + { + struct nvmem_device *nvmem = to_nvmem_device(dev); + +- return sprintf(buf, "%s\n", nvmem_type_str[nvmem->type]); ++ return sysfs_emit(buf, "%s\n", nvmem_type_str[nvmem->type]); + } + + static DEVICE_ATTR_RO(type); diff --git a/target/linux/generic/backport-6.6/822-v6.11-0010-nvmem-core-Implement-force_ro-sysfs-attribute.patch b/target/linux/generic/backport-6.6/822-v6.11-0010-nvmem-core-Implement-force_ro-sysfs-attribute.patch new file mode 100644 index 0000000000..28fb544a04 --- /dev/null +++ b/target/linux/generic/backport-6.6/822-v6.11-0010-nvmem-core-Implement-force_ro-sysfs-attribute.patch @@ -0,0 +1,122 @@ +From 9d7eb234ac7a56b88aea8a52ed81553a730fe25c Mon Sep 17 00:00:00 2001 +From: Marek Vasut +Date: Fri, 5 Jul 2024 08:48:52 +0100 +Subject: [PATCH] nvmem: core: Implement force_ro sysfs attribute + +Implement "force_ro" sysfs attribute to allow users to set read-write +devices as read-only and back to read-write from userspace. The choice +of the name is based on MMC core 'force_ro' attribute. + +This solves a situation where an AT24 I2C EEPROM with GPIO based nWP +signal may have to be occasionally updated. Such I2C EEPROM device is +usually set as read-only during most of the regular system operation, +but in case it has to be updated in a controlled manner, it could be +unlocked using this new "force_ro" sysfs attribute and then re-locked +again. + +The "read-only" DT property and config->read_only configuration is +respected and is used to set default state of the device, read-only +or read-write, for devices which do implement .reg_write function. +For devices which do not implement .reg_write function, the device +is unconditionally read-only and the "force_ro" attribute is not +visible. + +Signed-off-by: Marek Vasut +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240705074852.423202-16-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + Documentation/ABI/stable/sysfs-bus-nvmem | 17 ++++++++++ + drivers/nvmem/core.c | 43 ++++++++++++++++++++++++ + 2 files changed, 60 insertions(+) + +--- a/Documentation/ABI/stable/sysfs-bus-nvmem ++++ b/Documentation/ABI/stable/sysfs-bus-nvmem +@@ -1,3 +1,20 @@ ++What: /sys/bus/nvmem/devices/.../force_ro ++Date: June 2024 ++KernelVersion: 6.11 ++Contact: Marek Vasut ++Description: ++ This read/write attribute allows users to set read-write ++ devices as read-only and back to read-write from userspace. ++ This can be used to unlock and relock write-protection of ++ devices which are generally locked, except during sporadic ++ programming operation. ++ Read returns '0' or '1' for read-write or read-only modes ++ respectively. ++ Write parses one of 'YyTt1NnFf0', or [oO][NnFf] for "on" ++ and "off", i.e. what kstrbool() supports. ++ Note: This file is only present if CONFIG_NVMEM_SYSFS ++ is enabled. ++ + What: /sys/bus/nvmem/devices/.../nvmem + Date: July 2015 + KernelVersion: 4.2 +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -184,7 +184,30 @@ static ssize_t type_show(struct device * + + static DEVICE_ATTR_RO(type); + ++static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr, ++ char *buf) ++{ ++ struct nvmem_device *nvmem = to_nvmem_device(dev); ++ ++ return sysfs_emit(buf, "%d\n", nvmem->read_only); ++} ++ ++static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr, ++ const char *buf, size_t count) ++{ ++ struct nvmem_device *nvmem = to_nvmem_device(dev); ++ int ret = kstrtobool(buf, &nvmem->read_only); ++ ++ if (ret < 0) ++ return ret; ++ ++ return count; ++} ++ ++static DEVICE_ATTR_RW(force_ro); ++ + static struct attribute *nvmem_attrs[] = { ++ &dev_attr_force_ro.attr, + &dev_attr_type.attr, + NULL, + }; +@@ -285,6 +308,25 @@ static umode_t nvmem_bin_attr_is_visible + return nvmem_bin_attr_get_umode(nvmem); + } + ++static umode_t nvmem_attr_is_visible(struct kobject *kobj, ++ struct attribute *attr, int i) ++{ ++ struct device *dev = kobj_to_dev(kobj); ++ struct nvmem_device *nvmem = to_nvmem_device(dev); ++ ++ /* ++ * If the device has no .reg_write operation, do not allow ++ * configuration as read-write. ++ * If the device is set as read-only by configuration, it ++ * can be forced into read-write mode using the 'force_ro' ++ * attribute. ++ */ ++ if (attr == &dev_attr_force_ro.attr && !nvmem->reg_write) ++ return 0; /* Attribute not visible */ ++ ++ return attr->mode; ++} ++ + static struct nvmem_cell *nvmem_create_cell(struct nvmem_cell_entry *entry, + const char *id, int index); + +@@ -341,6 +383,7 @@ static const struct attribute_group nvme + .bin_attrs = nvmem_bin_attributes, + .attrs = nvmem_attrs, + .is_bin_visible = nvmem_bin_attr_is_visible, ++ .is_visible = nvmem_attr_is_visible, + }; + + static const struct attribute_group *nvmem_dev_groups[] = { diff --git a/target/linux/generic/backport-6.6/822-v6.11-0011-nvmem-u-boot-env-error-if-NVMEM-device-is-too-small.patch b/target/linux/generic/backport-6.6/822-v6.11-0011-nvmem-u-boot-env-error-if-NVMEM-device-is-too-small.patch new file mode 100644 index 0000000000..70d420f205 --- /dev/null +++ b/target/linux/generic/backport-6.6/822-v6.11-0011-nvmem-u-boot-env-error-if-NVMEM-device-is-too-small.patch @@ -0,0 +1,40 @@ +From 8679e8b4a1ebdb40c4429e49368d29353e07b601 Mon Sep 17 00:00:00 2001 +From: John Thomson +Date: Mon, 2 Sep 2024 15:25:08 +0100 +Subject: [PATCH] nvmem: u-boot-env: error if NVMEM device is too small +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Verify data size before trying to parse it to avoid reading out of +buffer. This could happen in case of problems at MTD level or invalid DT +bindings. + +Signed-off-by: John Thomson +Cc: stable +Fixes: d5542923f200 ("nvmem: add driver handling U-Boot environment variables") +[rmilecki: simplify commit description & rebase] +Signed-off-by: Rafał Miłecki +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240902142510.71096-2-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/u-boot-env.c | 7 +++++++ + 1 file changed, 7 insertions(+) + +--- a/drivers/nvmem/u-boot-env.c ++++ b/drivers/nvmem/u-boot-env.c +@@ -176,6 +176,13 @@ static int u_boot_env_parse(struct u_boo + data_offset = offsetof(struct u_boot_env_image_broadcom, data); + break; + } ++ ++ if (dev_size < data_offset) { ++ dev_err(dev, "Device too small for u-boot-env\n"); ++ err = -EIO; ++ goto err_kfree; ++ } ++ + crc32_addr = (__le32 *)(buf + crc32_offset); + crc32 = le32_to_cpu(*crc32_addr); + crc32_data_len = dev_size - crc32_data_offset; diff --git a/target/linux/generic/backport-6.6/822-v6.11-0012-nvmem-Fix-return-type-of-devm_nvmem_device_get-in-ke.patch b/target/linux/generic/backport-6.6/822-v6.11-0012-nvmem-Fix-return-type-of-devm_nvmem_device_get-in-ke.patch new file mode 100644 index 0000000000..6d49a253a4 --- /dev/null +++ b/target/linux/generic/backport-6.6/822-v6.11-0012-nvmem-Fix-return-type-of-devm_nvmem_device_get-in-ke.patch @@ -0,0 +1,37 @@ +From c69f37f6559a8948d70badd2b179db7714dedd62 Mon Sep 17 00:00:00 2001 +From: Geert Uytterhoeven +Date: Mon, 2 Sep 2024 15:25:09 +0100 +Subject: [PATCH] nvmem: Fix return type of devm_nvmem_device_get() in + kerneldoc + +devm_nvmem_device_get() returns an nvmem device, not an nvmem cell. + +Fixes: e2a5402ec7c6d044 ("nvmem: Add nvmem_device based consumer apis.") +Cc: stable +Signed-off-by: Geert Uytterhoeven +Signed-off-by: Srinivas Kandagatla +Link: https://lore.kernel.org/r/20240902142510.71096-3-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman +--- + drivers/nvmem/core.c | 6 +++--- + 1 file changed, 3 insertions(+), 3 deletions(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -1275,13 +1275,13 @@ void nvmem_device_put(struct nvmem_devic + EXPORT_SYMBOL_GPL(nvmem_device_put); + + /** +- * devm_nvmem_device_get() - Get nvmem cell of device form a given id ++ * devm_nvmem_device_get() - Get nvmem device of device form a given id + * + * @dev: Device that requests the nvmem device. + * @id: name id for the requested nvmem device. + * +- * Return: ERR_PTR() on error or a valid pointer to a struct nvmem_cell +- * on success. The nvmem_cell will be freed by the automatically once the ++ * Return: ERR_PTR() on error or a valid pointer to a struct nvmem_device ++ * on success. The nvmem_device will be freed by the automatically once the + * device is freed. + */ + struct nvmem_device *devm_nvmem_device_get(struct device *dev, const char *id) diff --git a/target/linux/generic/pending-5.15/802-nvmem-u-boot-env-align-endianness-of-crc32-values.patch b/target/linux/generic/pending-5.15/802-nvmem-u-boot-env-align-endianness-of-crc32-values.patch index d07447bcba..46acd47f63 100644 --- a/target/linux/generic/pending-5.15/802-nvmem-u-boot-env-align-endianness-of-crc32-values.patch +++ b/target/linux/generic/pending-5.15/802-nvmem-u-boot-env-align-endianness-of-crc32-values.patch @@ -36,7 +36,7 @@ Signed-off-by: Srinivas Kandagatla --- a/drivers/nvmem/u-boot-env.c +++ b/drivers/nvmem/u-boot-env.c -@@ -181,7 +181,7 @@ static int u_boot_env_parse(struct u_boo +@@ -188,7 +188,7 @@ static int u_boot_env_parse(struct u_boo crc32_data_len = dev_size - crc32_data_offset; data_len = dev_size - data_offset; diff --git a/target/linux/generic/pending-5.15/804-nvmem-core-support-mac-base-fixed-layout-cells.patch b/target/linux/generic/pending-5.15/804-nvmem-core-support-mac-base-fixed-layout-cells.patch index d6a471d576..29cda1824e 100644 --- a/target/linux/generic/pending-5.15/804-nvmem-core-support-mac-base-fixed-layout-cells.patch +++ b/target/linux/generic/pending-5.15/804-nvmem-core-support-mac-base-fixed-layout-cells.patch @@ -33,7 +33,7 @@ string. #include #include #include -@@ -779,6 +782,62 @@ static int nvmem_validate_keepouts(struc +@@ -797,6 +800,62 @@ static int nvmem_validate_keepouts(struc return 0; } @@ -96,7 +96,7 @@ string. static int nvmem_add_cells_from_dt(struct nvmem_device *nvmem, struct device_node *np) { struct device *dev = &nvmem->dev; -@@ -818,6 +877,25 @@ static int nvmem_add_cells_from_dt(struc +@@ -836,6 +895,25 @@ static int nvmem_add_cells_from_dt(struc if (nvmem->fixup_dt_cell_info) nvmem->fixup_dt_cell_info(nvmem, &info); diff --git a/target/linux/generic/pending-6.1/802-nvmem-u-boot-env-align-endianness-of-crc32-values.patch b/target/linux/generic/pending-6.1/802-nvmem-u-boot-env-align-endianness-of-crc32-values.patch index d07447bcba..46acd47f63 100644 --- a/target/linux/generic/pending-6.1/802-nvmem-u-boot-env-align-endianness-of-crc32-values.patch +++ b/target/linux/generic/pending-6.1/802-nvmem-u-boot-env-align-endianness-of-crc32-values.patch @@ -36,7 +36,7 @@ Signed-off-by: Srinivas Kandagatla --- a/drivers/nvmem/u-boot-env.c +++ b/drivers/nvmem/u-boot-env.c -@@ -181,7 +181,7 @@ static int u_boot_env_parse(struct u_boo +@@ -188,7 +188,7 @@ static int u_boot_env_parse(struct u_boo crc32_data_len = dev_size - crc32_data_offset; data_len = dev_size - data_offset; diff --git a/target/linux/generic/pending-6.1/804-nvmem-core-support-mac-base-fixed-layout-cells.patch b/target/linux/generic/pending-6.1/804-nvmem-core-support-mac-base-fixed-layout-cells.patch index d6a471d576..29cda1824e 100644 --- a/target/linux/generic/pending-6.1/804-nvmem-core-support-mac-base-fixed-layout-cells.patch +++ b/target/linux/generic/pending-6.1/804-nvmem-core-support-mac-base-fixed-layout-cells.patch @@ -33,7 +33,7 @@ string. #include #include #include -@@ -779,6 +782,62 @@ static int nvmem_validate_keepouts(struc +@@ -797,6 +800,62 @@ static int nvmem_validate_keepouts(struc return 0; } @@ -96,7 +96,7 @@ string. static int nvmem_add_cells_from_dt(struct nvmem_device *nvmem, struct device_node *np) { struct device *dev = &nvmem->dev; -@@ -818,6 +877,25 @@ static int nvmem_add_cells_from_dt(struc +@@ -836,6 +895,25 @@ static int nvmem_add_cells_from_dt(struc if (nvmem->fixup_dt_cell_info) nvmem->fixup_dt_cell_info(nvmem, &info); diff --git a/target/linux/generic/pending-6.6/802-nvmem-u-boot-env-align-endianness-of-crc32-values.patch b/target/linux/generic/pending-6.6/802-nvmem-u-boot-env-align-endianness-of-crc32-values.patch index d07447bcba..46acd47f63 100644 --- a/target/linux/generic/pending-6.6/802-nvmem-u-boot-env-align-endianness-of-crc32-values.patch +++ b/target/linux/generic/pending-6.6/802-nvmem-u-boot-env-align-endianness-of-crc32-values.patch @@ -36,7 +36,7 @@ Signed-off-by: Srinivas Kandagatla --- a/drivers/nvmem/u-boot-env.c +++ b/drivers/nvmem/u-boot-env.c -@@ -181,7 +181,7 @@ static int u_boot_env_parse(struct u_boo +@@ -188,7 +188,7 @@ static int u_boot_env_parse(struct u_boo crc32_data_len = dev_size - crc32_data_offset; data_len = dev_size - data_offset; diff --git a/target/linux/generic/pending-6.6/804-nvmem-core-support-mac-base-fixed-layout-cells.patch b/target/linux/generic/pending-6.6/804-nvmem-core-support-mac-base-fixed-layout-cells.patch index df724521be..241ff77a7b 100644 --- a/target/linux/generic/pending-6.6/804-nvmem-core-support-mac-base-fixed-layout-cells.patch +++ b/target/linux/generic/pending-6.6/804-nvmem-core-support-mac-base-fixed-layout-cells.patch @@ -33,7 +33,7 @@ string. #include #include #include -@@ -778,6 +781,62 @@ static int nvmem_validate_keepouts(struc +@@ -796,6 +799,62 @@ static int nvmem_validate_keepouts(struc return 0; } @@ -96,7 +96,7 @@ string. static int nvmem_add_cells_from_dt(struct nvmem_device *nvmem, struct device_node *np) { struct device *dev = &nvmem->dev; -@@ -817,6 +876,25 @@ static int nvmem_add_cells_from_dt(struc +@@ -835,6 +894,25 @@ static int nvmem_add_cells_from_dt(struc if (nvmem->fixup_dt_cell_info) nvmem->fixup_dt_cell_info(nvmem, &info);