Reviewed-by: Evan Quan <[email protected]> -----Original Message----- From: Colin King <[email protected]> Sent: Friday, November 15, 2019 5:48 PM To: Rex Zhu <[email protected]>; Quan, Evan <[email protected]>; Deucher, Alexander <[email protected]>; Koenig, Christian <[email protected]>; Zhou, David(ChunMing) <[email protected]>; David Airlie <[email protected]>; Daniel Vetter <[email protected]>; [email protected]; [email protected] Cc: [email protected]; [email protected] Subject: [PATCH][next] drm/amdgpu/powerplay: fix dereference before null check of pointer hwmgr
From: Colin Ian King <[email protected]> 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") Fixes: 0896d2f7ba4d ("drm/amdgpu/powerplay: properly set PP_GFXOFF_MASK") Signed-off-by: Colin Ian King <[email protected]> --- 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 443625c83ec9..d2909c91d65b 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; -- 2.20.1 _______________________________________________ dri-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/dri-devel
