[PATCH] drm/amd/pm: suppress static checker warning

[Evan Quan]

Suppress the warning below:
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/hardwaremanager.c:274 phm_check_smc_update_required_for_display_configuration()
warn: signedness bug returning '(-22)'

Change-Id: If50e39fe401c16d981d917ef7d8d5ea81d6538df
Reported-by: Dan Carpenter <dan.carpenter at oracle.com>
Signed-off-by: Evan Quan <evan.quan at amd.com>
---
 drivers/gpu/drm/amd/pm/powerplay/hwmgr/hardwaremanager.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/hardwaremanager.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/hardwaremanager.c
index 9454ab50f9a1..1f9b9facdf1f 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/hardwaremanager.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/hardwaremanager.c
@@ -271,7 +271,10 @@ int phm_start_thermal_controller(struct pp_hwmgr *hwmgr)
 
 bool phm_check_smc_update_required_for_display_configuration(struct pp_hwmgr *hwmgr)
 {
-	PHM_FUNC_CHECK(hwmgr);
+	if (hwmgr == NULL ||
+	    hwmgr->hwmgr_func == NULL)
+		return false;
+
 	if (hwmgr->pp_one_vf)
 		return false;
 
-- 
2.28.0