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From f70d7dab0998e1e9af945550a69c3535835c82eb Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Fri, 15 Nov 2019 09:47:54 +0000
Subject: [PATCH 4527/4736] drm/amdgpu/powerplay: fix dereference before null
check of pointer hwmgr
The assignment of adev dereferences pointer hwmgr before hwmgr is null
checked, hence there is a potential null pointer deference issue. Fix
this by assigning adev after the null check.
Addresses-Coverity: ("Dereference before null check")
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
index 72f2b09195dc..cf5043bbf748 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
@@ -81,7 +81,7 @@ static void hwmgr_init_workload_prority(struct pp_hwmgr *hwmgr)
int hwmgr_early_init(struct pp_hwmgr *hwmgr)
{
- struct amdgpu_device *adev = hwmgr->adev;
+ struct amdgpu_device *adev;
if (!hwmgr)
return -EINVAL;
@@ -96,6 +96,8 @@ int hwmgr_early_init(struct pp_hwmgr *hwmgr)
hwmgr_init_workload_prority(hwmgr);
hwmgr->gfxoff_state_changed_by_workload = false;
+ adev = hwmgr->adev;
+
switch (hwmgr->chip_family) {
case AMDGPU_FAMILY_CI:
adev->pm.pp_feature &= ~PP_GFXOFF_MASK;
--
2.17.1
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