diff options
| author | Kevin Wang <kevin1.wang@amd.com> | 2019-09-26 16:22:13 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-10-02 12:23:05 -0500 |
| commit | 00921306751001b539ebee34171485cd9c749024 (patch) | |
| tree | 64b535a3d65b06727747b93f517e500231f7ea9c /drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | |
| parent | e0e4a2ce7a059d051c66cd7c94314fef3cd91aea (diff) | |
drm/amd/powerplay: add sensor lock support for smu
when multithreading access sysfs of amdgpu_pm_info at the sametime.
the swsmu driver cause smu firmware hang.
eg:
single thread access:
Message A + Param A ==> right
Message B + Param B ==> right
Message C + Param C ==> right
multithreading access:
Message A + Param B ==> error
Message B + Param A ==> error
Message C + Param C ==> right
the patch will add sensor lock(mutex) to avoid this error.
Signed-off-by: Kevin Wang <kevin1.wang@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 5.3.x
Diffstat (limited to 'drivers/gpu/drm/amd/powerplay/amdgpu_smu.c')
| -rw-r--r-- | drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c index 33960fb38a5d..4acf139ea014 100644 --- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c +++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c @@ -843,6 +843,8 @@ static int smu_sw_init(void *handle) smu->smu_baco.state = SMU_BACO_STATE_EXIT; smu->smu_baco.platform_support = false; + mutex_init(&smu->sensor_lock); + smu->watermarks_bitmap = 0; smu->power_profile_mode = PP_SMC_POWER_PROFILE_BOOTUP_DEFAULT; smu->default_power_profile_mode = PP_SMC_POWER_PROFILE_BOOTUP_DEFAULT; |