drm/i915: fix error return code in init_pipe_control()

Fix to return -ENOMEM in the kmap() error handling case
instead of 0, as done elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 5698faeee6f6..9b97cf66a5ae 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -464,9 +464,11 @@ init_pipe_control(struct intel_ring_buffer *ring)
                 goto err_unref;
 
         pc->gtt_offset = obj->gtt_offset;
-        pc->cpu_page =  kmap(sg_page(obj->pages->sgl));
-        if (pc->cpu_page == NULL)
+        pc->cpu_page = kmap(sg_page(obj->pages->sgl));
+        if (pc->cpu_page == NULL) {
+                ret = -ENOMEM;
                 goto err_unpin;
+        }
 
         DRM_DEBUG_DRIVER("%s pipe control offset: 0x%08x\n",
                          ring->name, pc->gtt_offset);