--- /dev/null
+From 6f8c8bf4c7c9be1c42088689fd4370e06b46608a Mon Sep 17 00:00:00 2001
+From: Abinaya Kalaiselvan <akalaise@codeaurora.org>
+Date: Wed, 20 Oct 2021 11:59:07 +0300
+Subject: ath10k: fix module load regression with iram-recovery feature
+
+Commit 9af7c32ceca8 ("ath10k: add target IRAM recovery feature support")
+introduced a new firmware feature flag ATH10K_FW_FEATURE_IRAM_RECOVERY. But
+this caused ath10k_pci module load to fail if ATH10K_FW_CRASH_DUMP_RAM_DATA bit
+was not enabled in the ath10k coredump_mask module parameter:
+
+[ 2209.328190] ath10k_pci 0000:02:00.0: qca9984/qca9994 hw1.0 target 0x01000000 chip_id 0x00000000 sub 168c:cafe
+[ 2209.434414] ath10k_pci 0000:02:00.0: kconfig debug 1 debugfs 1 tracing 1 dfs 1 testmode 1
+[ 2209.547191] ath10k_pci 0000:02:00.0: firmware ver 10.4-3.9.0.2-00099 api 5 features no-p2p,mfp,peer-flow-ctrl,btcoex-param,allows-mesh-bcast,no-ps,peer-fixed-rate,iram-recovery crc32 cbade90a
+[ 2210.896485] ath10k_pci 0000:02:00.0: board_file api 1 bmi_id 0:1 crc32 a040efc2
+[ 2213.603339] ath10k_pci 0000:02:00.0: failed to copy target iram contents: -12
+[ 2213.839027] ath10k_pci 0000:02:00.0: could not init core (-12)
+[ 2213.933910] ath10k_pci 0000:02:00.0: could not probe fw (-12)
+
+And by default coredump_mask does not have ATH10K_FW_CRASH_DUMP_RAM_DATA
+enabled so anyone using a firmware with iram-recovery feature would fail. To my
+knowledge only QCA9984 firmwares starting from release 10.4-3.9.0.2-00099
+enabled the feature.
+
+The reason for regression was that ath10k_core_copy_target_iram() used
+ath10k_coredump_get_mem_layout() to get the memory layout, but when
+ATH10K_FW_CRASH_DUMP_RAM_DATA was disabled it would get just NULL and bail out
+with an error.
+
+While looking at all this I noticed another bug: if CONFIG_DEV_COREDUMP is
+disabled but the firmware has iram-recovery enabled the module load fails with
+similar error messages. I fixed that by returning 0 from
+ath10k_core_copy_target_iram() when _ath10k_coredump_get_mem_layout() returns
+NULL.
+
+Tested-on: QCA9984 hw2.0 PCI 10.4-3.9.0.2-00139
+
+Fixes: 9af7c32ceca8 ("ath10k: add target IRAM recovery feature support")
+Signed-off-by: Abinaya Kalaiselvan <akalaise@codeaurora.org>
+Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
+Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
+Link: https://lore.kernel.org/r/20211020075054.23061-1-kvalo@codeaurora.org
+---
+ drivers/net/wireless/ath/ath10k/core.c | 11 +++++++++--
+ drivers/net/wireless/ath/ath10k/coredump.c | 11 ++++++++---
+ drivers/net/wireless/ath/ath10k/coredump.h | 7 +++++++
+ 3 files changed, 24 insertions(+), 5 deletions(-)
+
+--- a/drivers/net/wireless/ath/ath10k/core.c
++++ b/drivers/net/wireless/ath/ath10k/core.c
+@@ -2690,9 +2690,16 @@ static int ath10k_core_copy_target_iram(
+ int i, ret;
+ u32 len, remaining_len;
+
+- hw_mem = ath10k_coredump_get_mem_layout(ar);
++ /* copy target iram feature must work also when
++ * ATH10K_FW_CRASH_DUMP_RAM_DATA is disabled, so
++ * _ath10k_coredump_get_mem_layout() to accomplist that
++ */
++ hw_mem = _ath10k_coredump_get_mem_layout(ar);
+ if (!hw_mem)
+- return -ENOMEM;
++ /* if CONFIG_DEV_COREDUMP is disabled we get NULL, then
++ * just silently disable the feature by doing nothing
++ */
++ return 0;
+
+ for (i = 0; i < hw_mem->region_table.size; i++) {
+ tmp = &hw_mem->region_table.regions[i];
+--- a/drivers/net/wireless/ath/ath10k/coredump.c
++++ b/drivers/net/wireless/ath/ath10k/coredump.c
+@@ -1447,11 +1447,17 @@ static u32 ath10k_coredump_get_ramdump_s
+
+ const struct ath10k_hw_mem_layout *ath10k_coredump_get_mem_layout(struct ath10k *ar)
+ {
+- int i;
+-
+ if (!test_bit(ATH10K_FW_CRASH_DUMP_RAM_DATA, &ath10k_coredump_mask))
+ return NULL;
+
++ return _ath10k_coredump_get_mem_layout(ar);
++}
++EXPORT_SYMBOL(ath10k_coredump_get_mem_layout);
++
++const struct ath10k_hw_mem_layout *_ath10k_coredump_get_mem_layout(struct ath10k *ar)
++{
++ int i;
++
+ if (WARN_ON(ar->target_version == 0))
+ return NULL;
+
+@@ -1464,7 +1470,6 @@ const struct ath10k_hw_mem_layout *ath10
+
+ return NULL;
+ }
+-EXPORT_SYMBOL(ath10k_coredump_get_mem_layout);
+
+ struct ath10k_fw_crash_data *ath10k_coredump_new(struct ath10k *ar)
+ {
+--- a/drivers/net/wireless/ath/ath10k/coredump.h
++++ b/drivers/net/wireless/ath/ath10k/coredump.h
+@@ -176,6 +176,7 @@ int ath10k_coredump_register(struct ath1
+ void ath10k_coredump_unregister(struct ath10k *ar);
+ void ath10k_coredump_destroy(struct ath10k *ar);
+
++const struct ath10k_hw_mem_layout *_ath10k_coredump_get_mem_layout(struct ath10k *ar);
+ const struct ath10k_hw_mem_layout *ath10k_coredump_get_mem_layout(struct ath10k *ar);
+
+ #else /* CONFIG_DEV_COREDUMP */
+@@ -213,6 +214,12 @@ ath10k_coredump_get_mem_layout(struct at
+ {
+ return NULL;
+ }
++
++static inline const struct ath10k_hw_mem_layout *
++_ath10k_coredump_get_mem_layout(struct ath10k *ar)
++{
++ return NULL;
++}
+
+ #endif /* CONFIG_DEV_COREDUMP */
+
projects / openwrt / staging / nbd.git / commitdiff