lkml.org 
[lkml]   [2017]   [Sep]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/1] drm/amd/powerplay: initialize a variable before using it
Date
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.

Fixes: f83a9991648b ("drm/amd/powerplay: add Vega10 powerplay support (v5)")
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
---
drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
index 197174e562d2..c8d28f78cd47 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
@@ -3043,6 +3043,8 @@ static int vega10_apply_state_adjust_rules(struct pp_hwmgr *hwmgr,

if (phm_cap_enabled(hwmgr->platform_descriptor.platformCaps,
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,
--
2.14.1
\
 
 \ /
  Last update: 2017-09-03 14:02    [W:0.058 / U:0.864 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site