[PATCH 1/1] drm/amd/powerplay: avoid NULL dereference, cz_hwmgr.c

[Heinrich Schuchardt]

if (a == NULL || a->b == NULL)
leads to a NULL pointer dereference if a == NULL.

Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
 drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c 
b/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c
index 8cc0df9..5e2d4cf 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c
@@ -1246,7 +1246,7 @@ static int cz_hwmgr_backend_init(struct pp_hwmgr *hwmgr)
 
 static int cz_hwmgr_backend_fini(struct pp_hwmgr *hwmgr)
 {
-       if (hwmgr != NULL || hwmgr->backend != NULL) {
+       if (hwmgr != NULL && hwmgr->backend != NULL) {
                kfree(hwmgr->backend);
                kfree(hwmgr);
        }
-- 
2.1.4