diff options
| author | Nicolas Iooss <nicolas.iooss_linux@m4x.org> | 2017-09-03 14:00:57 +0200 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-11-07 16:40:48 -0500 |
| commit | 0d1da3c15291c478193b7310dfef023add2249cc (patch) | |
| tree | fe41bde1361b66c781007a89d5554cac79be8058 | |
| parent | 1d864b82a2bde6c583f23dfc7183d07dc9b48b6d (diff) | |
| download | linux-0d1da3c15291c478193b7310dfef023add2249cc.tar.bz2 | |
drm/amd/powerplay: initialize a variable before using it
Function vega10_apply_state_adjust_rules() only initializes
stable_pstate_sclk_dpm_percentage when
data->registry_data.stable_pstate_sclk_dpm_percentage is not between 1
and 100. The variable is then used to compute stable_pstate_sclk, which
therefore uses an uninitialized value.
Fix this by initializing stable_pstate_sclk_dpm_percentage to
data->registry_data.stable_pstate_sclk_dpm_percentage.
This issue has been found while building the kernel with clang. The
compiler reported a -Wsometimes-uninitialized warning.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Fixes: f83a9991648b ("drm/amd/powerplay: add Vega10 powerplay support (v5)")
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c index b66df60afe01..4f79c21f27ed 100644 --- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c @@ -3138,6 +3138,8 @@ static int vega10_apply_state_adjust_rules(struct pp_hwmgr *hwmgr, minimum_clocks.memoryClock = hwmgr->display_config.min_mem_set_clock; if (PP_CAP(PHM_PlatformCaps_StablePState)) { + stable_pstate_sclk_dpm_percentage = + data->registry_data.stable_pstate_sclk_dpm_percentage; PP_ASSERT_WITH_CODE( data->registry_data.stable_pstate_sclk_dpm_percentage >= 1 && data->registry_data.stable_pstate_sclk_dpm_percentage <= 100, |