drm/nouveau/dmem: Fix a NULL vs IS_ERR() check

Dan Carpenter · Ben Skeggs · commit 18ec3c129bca · 2019-03-22T09:57:58.000+10:00
The hmm_devmem_add() function doesn't return NULL, it returns error pointers. Fixes: 5be73b6 ("drm/nouveau/dmem: device memory helpers for SVM") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c b/drivers/gpu/drm/nouveau/nouveau_dmem.c
@@ -621,7 +621,7 @@ nouveau_dmem_init(struct nouveau_drm *drm)
 	 */
 	drm->dmem->devmem = hmm_devmem_add(&nouveau_dmem_devmem_ops,
 					   device, size);
-	if (drm->dmem->devmem == NULL) {
+	if (IS_ERR(drm->dmem->devmem)) {
 		kfree(drm->dmem);
 		drm->dmem = NULL;
 		return;
