drm/radeon: r6xx/r7xx: fix possible oops in r600_page_table_cleanup()

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/r600_cp.c b/drivers/gpu/drm/radeon/r600_cp.c
index 37249b26f83..f915f1153b4 100644
--- a/drivers/gpu/drm/radeon/r600_cp.c
+++ b/drivers/gpu/drm/radeon/r600_cp.c
@@ -121,6 +121,9 @@ void r600_page_table_cleanup(struct drm_device *dev, struct drm_ati_pcigart_info
         int pages;
         int i;
 
+        if (!entry)
+                return;
+
         if (gart_info->bus_addr) {
                 max_pages = (gart_info->table_size / sizeof(u32));
                 pages = (entry->pages <= max_pages)