From 985863d00a8feb597a38df38f8fc2f70e980156f Mon Sep 17 00:00:00 2001 From: Nathan Chancellor Date: Wed, 3 Jul 2019 22:52:18 -0700 Subject: drm/amd/powerplay: Zero initialize current_rpm in vega20_get_fan_speed_percent clang warns (trimmed for brevity): drivers/gpu/drm/amd/amdgpu/../powerplay/vega20_ppt.c:3023:8: warning: variable 'current_rpm' is used uninitialized whenever '?:' condition is false [-Wsometimes-uninitialized] ret = smu_get_current_rpm(smu, ¤t_rpm); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ smu_get_current_rpm expands to a ternary operator conditional on smu->funcs->get_current_rpm being not NULL. When this is false, current_rpm will be uninitialized. Zero initialize current_rpm to avoid using random stack values if that ever happens. Fixes: ee0db82027ee ("drm/amd/powerplay: move PPTable_t uses into asic level") Link: https://github.com/ClangBuiltLinux/linux/issues/588 Signed-off-by: Nathan Chancellor Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/powerplay/vega20_ppt.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'drivers/gpu') diff --git a/drivers/gpu/drm/amd/powerplay/vega20_ppt.c b/drivers/gpu/drm/amd/powerplay/vega20_ppt.c index 0f14fe14ecd8..3d8938854aa7 100644 --- a/drivers/gpu/drm/amd/powerplay/vega20_ppt.c +++ b/drivers/gpu/drm/amd/powerplay/vega20_ppt.c @@ -3016,8 +3016,7 @@ static int vega20_get_fan_speed_percent(struct smu_context *smu, uint32_t *speed) { int ret = 0; - uint32_t percent = 0; - uint32_t current_rpm; + uint32_t current_rpm = 0, percent = 0; PPTable_t *pptable = smu->smu_table.driver_pptable; ret = smu_get_current_rpm(smu, ¤t_rpm); -- cgit v1.2.3-58-ga151