From 0dec0e0f1931bb6089daef6cfb5a3670bcaa64b7 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Tue, 31 Oct 2023 17:09:45 +0100 Subject: [PATCH] kernel: fix mtd/NVMEM regression affecting U-Boot env NVMEM driver MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Fixes: 20736013e910 ("kernel: backport nvmem v6.6 fixes and v6.7 changes") Fixes: https://github.com/openwrt/openwrt/issues/13831 Signed-off-by: Rafał Miłecki (cherry picked from commit c997634c017294cb38cf6f9a0112860c7e736a53) --- ...or-support-mtd-name-from-device-tree.patch | 2 +- ...rans-call-add-disks-after-mtd-device.patch | 2 +- ...upport-OpenWrt-s-MTD_ROOTFS_ROOT_DEV.patch | 2 +- ...er-NVMEM-devices-for-partitions-with.patch | 48 +++++++++++++++++++ ...or-support-mtd-name-from-device-tree.patch | 2 +- 5 files changed, 52 insertions(+), 4 deletions(-) create mode 100644 target/linux/generic/pending-5.15/401-mtd-don-t-register-NVMEM-devices-for-partitions-with.patch diff --git a/target/linux/ath79/patches-5.15/401-mtd-nor-support-mtd-name-from-device-tree.patch b/target/linux/ath79/patches-5.15/401-mtd-nor-support-mtd-name-from-device-tree.patch index 7db6346c37..36f5331bd0 100644 --- a/target/linux/ath79/patches-5.15/401-mtd-nor-support-mtd-name-from-device-tree.patch +++ b/target/linux/ath79/patches-5.15/401-mtd-nor-support-mtd-name-from-device-tree.patch @@ -34,7 +34,7 @@ Signed-off-by: Abhimanyu Vishwakarma mtd->type = MTD_NORFLASH; --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c -@@ -847,6 +847,17 @@ out_error: +@@ -870,6 +870,17 @@ out_error: */ static void mtd_set_dev_defaults(struct mtd_info *mtd) { diff --git a/target/linux/generic/hack-5.15/402-mtd-blktrans-call-add-disks-after-mtd-device.patch b/target/linux/generic/hack-5.15/402-mtd-blktrans-call-add-disks-after-mtd-device.patch index 62737aa779..1df6f2f18b 100644 --- a/target/linux/generic/hack-5.15/402-mtd-blktrans-call-add-disks-after-mtd-device.patch +++ b/target/linux/generic/hack-5.15/402-mtd-blktrans-call-add-disks-after-mtd-device.patch @@ -77,7 +77,7 @@ Signed-off-by: Daniel Golle #include "mtdcore.h" -@@ -1083,6 +1084,8 @@ int mtd_device_parse_register(struct mtd +@@ -1106,6 +1107,8 @@ int mtd_device_parse_register(struct mtd register_reboot_notifier(&mtd->reboot_notifier); } diff --git a/target/linux/generic/hack-5.15/420-mtd-support-OpenWrt-s-MTD_ROOTFS_ROOT_DEV.patch b/target/linux/generic/hack-5.15/420-mtd-support-OpenWrt-s-MTD_ROOTFS_ROOT_DEV.patch index 947b2c262f..ed46301b0e 100644 --- a/target/linux/generic/hack-5.15/420-mtd-support-OpenWrt-s-MTD_ROOTFS_ROOT_DEV.patch +++ b/target/linux/generic/hack-5.15/420-mtd-support-OpenWrt-s-MTD_ROOTFS_ROOT_DEV.patch @@ -12,7 +12,7 @@ Signed-off-by: Rafał Miłecki --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c -@@ -761,7 +761,8 @@ int add_mtd_device(struct mtd_info *mtd) +@@ -784,7 +784,8 @@ int add_mtd_device(struct mtd_info *mtd) mutex_unlock(&mtd_table_mutex); diff --git a/target/linux/generic/pending-5.15/401-mtd-don-t-register-NVMEM-devices-for-partitions-with.patch b/target/linux/generic/pending-5.15/401-mtd-don-t-register-NVMEM-devices-for-partitions-with.patch new file mode 100644 index 0000000000..650e10a3a5 --- /dev/null +++ b/target/linux/generic/pending-5.15/401-mtd-don-t-register-NVMEM-devices-for-partitions-with.patch @@ -0,0 +1,48 @@ +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Tue, 31 Oct 2023 15:51:01 +0100 +Subject: [PATCH] mtd: don't register NVMEM devices for partitions with custom + drivers +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This fixes issue exposed by upstream commit f4cf4e5db331 ("Revert +"nvmem: add new config option""). + +Signed-off-by: Rafał Miłecki +--- + drivers/mtd/mtdcore.c | 23 +++++++++++++++++++++++ + 1 file changed, 23 insertions(+) + +--- a/drivers/mtd/mtdcore.c ++++ b/drivers/mtd/mtdcore.c +@@ -537,6 +537,29 @@ static int mtd_nvmem_add(struct mtd_info + struct device_node *node = mtd_get_of_node(mtd); + struct nvmem_config config = {}; + ++ /* ++ * Do NOT register NVMEM device for any partition that is meant to be ++ * handled by a U-Boot env driver. That would result in associating two ++ * different NVMEM devices with the same OF node. ++ * ++ * An example of unwanted behaviour of above (forwardtrace): ++ * of_get_mac_addr_nvmem() ++ * of_nvmem_cell_get() ++ * __nvmem_device_get() ++ * ++ * We can't have __nvmem_device_get() return "mtdX" NVMEM device instead ++ * of U-Boot env NVMEM device. That would result in failing to find ++ * NVMEM cell. ++ * ++ * This issue seems to affect U-Boot env case only and will go away with ++ * switch to NVMEM layouts. ++ */ ++ if (of_device_is_compatible(node, "u-boot,env") || ++ of_device_is_compatible(node, "u-boot,env-redundant-bool") || ++ of_device_is_compatible(node, "u-boot,env-redundant-count") || ++ of_device_is_compatible(node, "brcm,env")) ++ return 0; ++ + config.id = -1; + config.dev = &mtd->dev; + config.name = dev_name(&mtd->dev); diff --git a/target/linux/pistachio/patches-5.15/401-mtd-nor-support-mtd-name-from-device-tree.patch b/target/linux/pistachio/patches-5.15/401-mtd-nor-support-mtd-name-from-device-tree.patch index 7db6346c37..36f5331bd0 100644 --- a/target/linux/pistachio/patches-5.15/401-mtd-nor-support-mtd-name-from-device-tree.patch +++ b/target/linux/pistachio/patches-5.15/401-mtd-nor-support-mtd-name-from-device-tree.patch @@ -34,7 +34,7 @@ Signed-off-by: Abhimanyu Vishwakarma mtd->type = MTD_NORFLASH; --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c -@@ -847,6 +847,17 @@ out_error: +@@ -870,6 +870,17 @@ out_error: */ static void mtd_set_dev_defaults(struct mtd_info *mtd) { -- 2.30.2