This is a note to let you know that I've just added the patch titled
drm/amdgpu/pm: Fix NULL pointer dereference when get power limit
to the 6.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amdgpu-pm-fix-null-pointer-dereference-when-get-.patch
and it can be found in the queue-6.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 10101dc3c320a39f9cda1e191d398d0631b89d16
Author: Ma Jun <Jun.Ma2@xxxxxxx>
Date: Mon Mar 11 14:38:34 2024 +0800
drm/amdgpu/pm: Fix NULL pointer dereference when get power limit
[ Upstream commit 08ae9ef829b8055c2fdc8cfee37510c1f4721a07 ]
Because powerplay_table initialization is skipped under
sriov case, We check and set default lower and upper OD
value if powerplay_table is NULL.
Fixes: 7968e9748fbb ("drm/amdgpu/pm: Fix the power1_min_cap value")
Signed-off-by: Ma Jun <Jun.Ma2@xxxxxxx>
Reported-by: Yin Zhenguo <zhenguo.yin@xxxxxxx>
Suggested-by: Lazar Lijo <lijo.lazar@xxxxxxx>
Suggested-by: Alex Deucher <Alexander.Deucher@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c
index 294a890beceb4..df4e02d0d1264 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c
@@ -1286,7 +1286,7 @@ static int arcturus_get_power_limit(struct smu_context *smu,
struct smu_11_0_powerplay_table *powerplay_table =
(struct smu_11_0_powerplay_table *)smu->smu_table.power_play_table;
PPTable_t *pptable = smu->smu_table.driver_pptable;
- uint32_t power_limit, od_percent_upper, od_percent_lower;
+ uint32_t power_limit, od_percent_upper = 0, od_percent_lower = 0;
if (smu_v11_0_get_current_power_limit(smu, &power_limit)) {
/* the last hope to figure out the ppt limit */
@@ -1303,12 +1303,14 @@ static int arcturus_get_power_limit(struct smu_context *smu,
if (default_power_limit)
*default_power_limit = power_limit;
- if (smu->od_enabled)
- od_percent_upper = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_11_0_ODSETTING_POWERPERCENTAGE]);
- else
- od_percent_upper = 0;
+ if (powerplay_table) {
+ if (smu->od_enabled)
+ od_percent_upper = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_11_0_ODSETTING_POWERPERCENTAGE]);
+ else
+ od_percent_upper = 0;
- od_percent_lower = le32_to_cpu(powerplay_table->overdrive_table.min[SMU_11_0_ODSETTING_POWERPERCENTAGE]);
+ od_percent_lower = le32_to_cpu(powerplay_table->overdrive_table.min[SMU_11_0_ODSETTING_POWERPERCENTAGE]);
+ }
dev_dbg(smu->adev->dev, "od percent upper:%d, od percent lower:%d (default power: %d)\n",
od_percent_upper, od_percent_lower, power_limit);
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
index aefe72c8abd2d..d36ad0e4e18e2 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
@@ -2339,7 +2339,7 @@ static int navi10_get_power_limit(struct smu_context *smu,
(struct smu_11_0_powerplay_table *)smu->smu_table.power_play_table;
struct smu_11_0_overdrive_table *od_settings = smu->od_settings;
PPTable_t *pptable = smu->smu_table.driver_pptable;
- uint32_t power_limit, od_percent_upper, od_percent_lower;
+ uint32_t power_limit, od_percent_upper = 0, od_percent_lower = 0;
if (smu_v11_0_get_current_power_limit(smu, &power_limit)) {
/* the last hope to figure out the ppt limit */
@@ -2356,13 +2356,15 @@ static int navi10_get_power_limit(struct smu_context *smu,
if (default_power_limit)
*default_power_limit = power_limit;
- if (smu->od_enabled &&
- navi10_od_feature_is_supported(od_settings, SMU_11_0_ODCAP_POWER_LIMIT))
- od_percent_upper = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_11_0_ODSETTING_POWERPERCENTAGE]);
- else
- od_percent_upper = 0;
+ if (powerplay_table) {
+ if (smu->od_enabled &&
+ navi10_od_feature_is_supported(od_settings, SMU_11_0_ODCAP_POWER_LIMIT))
+ od_percent_upper = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_11_0_ODSETTING_POWERPERCENTAGE]);
+ else
+ od_percent_upper = 0;
- od_percent_lower = le32_to_cpu(powerplay_table->overdrive_table.min[SMU_11_0_ODSETTING_POWERPERCENTAGE]);
+ od_percent_lower = le32_to_cpu(powerplay_table->overdrive_table.min[SMU_11_0_ODSETTING_POWERPERCENTAGE]);
+ }
dev_dbg(smu->adev->dev, "od percent upper:%d, od percent lower:%d (default power: %d)\n",
od_percent_upper, od_percent_lower, power_limit);
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
index fa953d4445487..3bb5856655181 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
@@ -625,7 +625,7 @@ static int sienna_cichlid_get_power_limit(struct smu_context *smu,
{
struct smu_11_0_7_powerplay_table *powerplay_table =
(struct smu_11_0_7_powerplay_table *)smu->smu_table.power_play_table;
- uint32_t power_limit, od_percent_upper, od_percent_lower;
+ uint32_t power_limit, od_percent_upper = 0, od_percent_lower = 0;
uint16_t *table_member;
GET_PPTABLE_MEMBER(SocketPowerLimitAc, &table_member);
@@ -640,12 +640,14 @@ static int sienna_cichlid_get_power_limit(struct smu_context *smu,
if (default_power_limit)
*default_power_limit = power_limit;
- if (smu->od_enabled)
- od_percent_upper = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_11_0_7_ODSETTING_POWERPERCENTAGE]);
- else
- od_percent_upper = 0;
+ if (powerplay_table) {
+ if (smu->od_enabled)
+ od_percent_upper = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_11_0_7_ODSETTING_POWERPERCENTAGE]);
+ else
+ od_percent_upper = 0;
- od_percent_lower = le32_to_cpu(powerplay_table->overdrive_table.min[SMU_11_0_7_ODSETTING_POWERPERCENTAGE]);
+ od_percent_lower = le32_to_cpu(powerplay_table->overdrive_table.min[SMU_11_0_7_ODSETTING_POWERPERCENTAGE]);
+ }
dev_dbg(smu->adev->dev, "od percent upper:%d, od percent lower:%d (default power: %d)\n",
od_percent_upper, od_percent_lower, power_limit);
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
index ac3c9e0966ed6..e5cae0919d474 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
@@ -2351,7 +2351,7 @@ static int smu_v13_0_0_get_power_limit(struct smu_context *smu,
(struct smu_13_0_0_powerplay_table *)table_context->power_play_table;
PPTable_t *pptable = table_context->driver_pptable;
SkuTable_t *skutable = &pptable->SkuTable;
- uint32_t power_limit, od_percent_upper, od_percent_lower;
+ uint32_t power_limit, od_percent_upper = 0, od_percent_lower = 0;
uint32_t msg_limit = skutable->MsgLimits.Power[PPT_THROTTLER_PPT0][POWER_SOURCE_AC];
if (smu_v13_0_get_current_power_limit(smu, &power_limit))
@@ -2364,12 +2364,14 @@ static int smu_v13_0_0_get_power_limit(struct smu_context *smu,
if (default_power_limit)
*default_power_limit = power_limit;
- if (smu->od_enabled)
- od_percent_upper = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_13_0_0_ODSETTING_POWERPERCENTAGE]);
- else
- od_percent_upper = 0;
+ if (powerplay_table) {
+ if (smu->od_enabled)
+ od_percent_upper = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_13_0_0_ODSETTING_POWERPERCENTAGE]);
+ else
+ od_percent_upper = 0;
- od_percent_lower = le32_to_cpu(powerplay_table->overdrive_table.min[SMU_13_0_0_ODSETTING_POWERPERCENTAGE]);
+ od_percent_lower = le32_to_cpu(powerplay_table->overdrive_table.min[SMU_13_0_0_ODSETTING_POWERPERCENTAGE]);
+ }
dev_dbg(smu->adev->dev, "od percent upper:%d, od percent lower:%d (default power: %d)\n",
od_percent_upper, od_percent_lower, power_limit);
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c
index b296c5f9d98d0..374a4a954b944 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c
@@ -2315,7 +2315,7 @@ static int smu_v13_0_7_get_power_limit(struct smu_context *smu,
(struct smu_13_0_7_powerplay_table *)table_context->power_play_table;
PPTable_t *pptable = table_context->driver_pptable;
SkuTable_t *skutable = &pptable->SkuTable;
- uint32_t power_limit, od_percent_upper, od_percent_lower;
+ uint32_t power_limit, od_percent_upper = 0, od_percent_lower = 0;
uint32_t msg_limit = skutable->MsgLimits.Power[PPT_THROTTLER_PPT0][POWER_SOURCE_AC];
if (smu_v13_0_get_current_power_limit(smu, &power_limit))
@@ -2328,12 +2328,14 @@ static int smu_v13_0_7_get_power_limit(struct smu_context *smu,
if (default_power_limit)
*default_power_limit = power_limit;
- if (smu->od_enabled)
- od_percent_upper = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_13_0_7_ODSETTING_POWERPERCENTAGE]);
- else
- od_percent_upper = 0;
+ if (powerplay_table) {
+ if (smu->od_enabled)
+ od_percent_upper = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_13_0_7_ODSETTING_POWERPERCENTAGE]);
+ else
+ od_percent_upper = 0;
- od_percent_lower = le32_to_cpu(powerplay_table->overdrive_table.min[SMU_13_0_7_ODSETTING_POWERPERCENTAGE]);
+ od_percent_lower = le32_to_cpu(powerplay_table->overdrive_table.min[SMU_13_0_7_ODSETTING_POWERPERCENTAGE]);
+ }
dev_dbg(smu->adev->dev, "od percent upper:%d, od percent lower:%d (default power: %d)\n",
od_percent_upper, od_percent_lower, power_limit);
