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drm/amd/powerplay: add powerplay valid check to avoid null point.

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In case CONFIG_DRM_AMD_POWERPLAY is defined and amdgpu.powerplay=0.
some functions in powrplay can also be called by DAL. and the input parameter is *adev.
if just check point not NULL was not enough and will lead to NULL point error.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Rex Zhu 2015-12-29 13:56:03 +08:00 committed by Alex Deucher
parent 0f18563aaa
commit fa9e699105
1 changed files with 9 additions and 3 deletions
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12
drivers/gpu/drm/amd/powerplay/amd_powerplay.c
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@ -786,7 +786,9 @@ int amd_powerplay_get_current_clocks(void *handle,
struct amd_pp_simple_clock_info simple_clocks;
struct pp_clock_info hw_clocks;
if (handle == NULL || clocks == NULL)
PP_CHECK((struct pp_instance *)handle);
if (clocks == NULL)
return -EINVAL;
hwmgr = ((struct pp_instance *)handle)->hwmgr;
@ -828,7 +830,9 @@ int amd_powerplay_get_clock_by_type(void *handle, enum amd_pp_clock_type type, s
struct pp_hwmgr *hwmgr;
if (handle == NULL || clocks == NULL)
PP_CHECK((struct pp_instance *)handle);
if (clocks == NULL)
return -EINVAL;
hwmgr = ((struct pp_instance *)handle)->hwmgr;
@ -844,7 +848,9 @@ int amd_powerplay_get_display_mode_validation_clocks(void *handle,
int result = -1;
struct pp_hwmgr *hwmgr;
if (handle == NULL || clocks == NULL)
PP_CHECK((struct pp_instance *)handle);
if (clocks == NULL)
return -EINVAL;
hwmgr = ((struct pp_instance *)handle)->hwmgr;