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drm/amd/powerplay: avoid NULL dereference, cz_hwmgr.c

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

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Heinrich Schuchardt 2016-08-21 20:27:02 +02:00 committed by Alex Deucher
parent d36f3e048e
commit bb1800caf7
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c
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@ -1218,7 +1218,7 @@ 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);
}