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drm/amdgpu: add pm sysfs files late 

They were added relatively early in the driver init process
which meant that in some cases the driver was not finished
initializing before external tools tried to use them which
could result in a crash depending on the timing.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2015-09-30 17:05:40 -04:00
parent 51a4726b04
commit fa022a9b65
3 changed files with 17 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/gpu/drm/amd/amdgpu/ci_dpm.c
View File

@ -6185,6 +6185,11 @@ static int ci_dpm_late_init(void *handle)
if (!amdgpu_dpm)
return 0;
/* init the sysfs and debugfs files late */
ret = amdgpu_pm_sysfs_init(adev);
if (ret)
return ret;
ret = ci_set_temperature_range(adev);
if (ret)
return ret;
@ -6232,9 +6237,6 @@ static int ci_dpm_sw_init(void *handle)
adev->pm.dpm.current_ps = adev->pm.dpm.requested_ps = adev->pm.dpm.boot_ps;
if (amdgpu_dpm == 1)
amdgpu_pm_print_power_states(adev);
ret = amdgpu_pm_sysfs_init(adev);
if (ret)
goto dpm_failed;
mutex_unlock(&adev->pm.mutex);
DRM_INFO("amdgpu: dpm initialized\n");

10
drivers/gpu/drm/amd/amdgpu/cz_dpm.c
View File

@ -596,6 +596,12 @@ static int cz_dpm_late_init(void *handle)
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
if (amdgpu_dpm) {
int ret;
/* init the sysfs and debugfs files late */
ret = amdgpu_pm_sysfs_init(adev);
if (ret)
return ret;
/* powerdown unused blocks for now */
cz_dpm_powergate_uvd(adev, true);
cz_dpm_powergate_vce(adev, true);
@ -632,10 +638,6 @@ static int cz_dpm_sw_init(void *handle)
if (amdgpu_dpm == 1)
amdgpu_pm_print_power_states(adev);
ret = amdgpu_pm_sysfs_init(adev);
if (ret)
goto dpm_init_failed;
mutex_unlock(&adev->pm.mutex);
DRM_INFO("amdgpu: dpm initialized\n");

9
drivers/gpu/drm/amd/amdgpu/kv_dpm.c
View File

@ -2995,6 +2995,12 @@ static int kv_dpm_late_init(void *handle)
{
/* powerdown unused blocks for now */
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
int ret;
/* init the sysfs and debugfs files late */
ret = amdgpu_pm_sysfs_init(adev);
if (ret)
return ret;
kv_dpm_powergate_acp(adev, true);
kv_dpm_powergate_samu(adev, true);
@ -3038,9 +3044,6 @@ static int kv_dpm_sw_init(void *handle)
adev->pm.dpm.current_ps = adev->pm.dpm.requested_ps = adev->pm.dpm.boot_ps;
if (amdgpu_dpm == 1)
amdgpu_pm_print_power_states(adev);
ret = amdgpu_pm_sysfs_init(adev);
if (ret)
goto dpm_failed;
mutex_unlock(&adev->pm.mutex);
DRM_INFO("amdgpu: dpm initialized\n");