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

The hmm_devmem_add() function doesn't return NULL, it returns error
pointers.

Fixes: 5be73b690875 ("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
index 58b4cb3..b1df42f 100644 (file)
--- 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;