From: Huang Rui <ray.huang@amd.com>
Date: Fri, 18 May 2018 10:39:16 +0800
Subject: drm/amd/powerplay: fix missed hwmgr check warning before call
gfx_off_control handler
Git-commit: 7584498c1c67bba4d1f5a0f7bf48c9a50c3ff5c8
Patch-mainline: v4.18-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Patch 9667849bbb8d: "drm/amd/powerplay: add control gfxoff enabling in late
init" from Mar 13, 2018, leads to the following static checker warning:
drivers/gpu/drm/amd/amdgpu/../powerplay/amd_powerplay.c:194
pp_late_init()
error: we previously assumed 'hwmgr' could be null (see line 185)
drivers/gpu/drm/amd/amdgpu/../powerplay/amd_powerplay.c
This patch fixes the warning to add hwmgr checking.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/powerplay/amd_powerplay.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
+++ b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
@@ -191,7 +191,8 @@ static int pp_late_init(void *handle)
if (adev->pm.smu_prv_buffer_size != 0)
pp_reserve_vram_for_smu(adev);
- if (hwmgr->hwmgr_func->gfx_off_control &&
+ if (hwmgr && hwmgr->hwmgr_func &&
+ hwmgr->hwmgr_func->gfx_off_control &&
(hwmgr->feature_mask & PP_GFXOFF_MASK)) {
ret = hwmgr->hwmgr_func->gfx_off_control(hwmgr, true);
if (ret)