drm: Fix error handling in drm_master_create

We need to check whether drm_ht_create succeed and clean up
if not.

Spotted by coverity.

Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c
index 4c24c3ac1efaf28225aa635834e982c9f5a6055b..bfa6cb949545c73867aee77ae3b1690ca39f06f7 100644 (file)
--- a/drivers/gpu/drm/drm_stub.c
+++ b/drivers/gpu/drm/drm_stub.c
@@ -128,7 +128,10 @@ struct drm_master *drm_master_create(struct drm_minor *minor)
        kref_init(&master->refcount);
        spin_lock_init(&master->lock.spinlock);
        init_waitqueue_head(&master->lock.lock_queue);
-       drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
+       if (drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER)) {
+               kfree(master);
+               return NULL;
+       }
        INIT_LIST_HEAD(&master->magicfree);
        master->minor = minor;