diff options
| author | Andrey Grodzovsky <andrey.grodzovsky@amd.com> | 2019-09-03 23:47:40 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-09-17 22:23:58 +0300 |
| commit | 1963b7c3beda608501deaf9010b53ec6cb6adbf1 (patch) | |
| tree | cd339ddf1cac2123f4da82704806016216635561 /drivers/gpu | |
| parent | f79e06bd44e5be98b75f71ac0cde6c16be278180 (diff) | |
| download | linux-1963b7c3beda608501deaf9010b53ec6cb6adbf1.tar.xz | |
drm/amdgpu: Add smu lock around in pp_smu_i2c_bus_access
Protect from concurrent SMU accesses.
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Reviewed-and-tested-by: Guchun Chen <guchun.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/powerplay/amd_powerplay.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c index fa636cb462c1..fa8ad7db2b3a 100644 --- a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c +++ b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c @@ -1531,6 +1531,7 @@ static int pp_asic_reset_mode_2(void *handle) static int pp_smu_i2c_bus_access(void *handle, bool acquire) { struct pp_hwmgr *hwmgr = handle; + int ret = 0; if (!hwmgr || !hwmgr->pm_en) return -EINVAL; @@ -1540,7 +1541,11 @@ static int pp_smu_i2c_bus_access(void *handle, bool acquire) return -EINVAL; } - return hwmgr->hwmgr_func->smu_i2c_bus_access(hwmgr, acquire); + mutex_lock(&hwmgr->smu_lock); + ret = hwmgr->hwmgr_func->smu_i2c_bus_access(hwmgr, acquire); + mutex_unlock(&hwmgr->smu_lock); + + return ret; } static const struct amd_pm_funcs pp_dpm_funcs = { |