diff --git a/[refs] b/[refs]
index 1f03afb30953..abd7ea5bd496 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 90f959bcb386da2c71613dcefc6a285e054a539e
+refs/heads/master: d008877550d8ca8c6878dd494e50c1b9209f38d4
diff --git a/trunk/drivers/gpu/drm/i915/i915_gem.c b/trunk/drivers/gpu/drm/i915/i915_gem.c
index e5d2bdf2cc9b..e0389ad1477d 100644
--- a/trunk/drivers/gpu/drm/i915/i915_gem.c
+++ b/trunk/drivers/gpu/drm/i915/i915_gem.c
@@ -446,13 +446,16 @@ fast_shmem_write(struct page **pages,
 		 int length)
 {
 	char __iomem *vaddr;
+	unsigned long unwritten;
 
 	vaddr = kmap_atomic(pages[page_base >> PAGE_SHIFT], KM_USER0);
 	if (vaddr == NULL)
 		return -ENOMEM;
-	__copy_from_user_inatomic(vaddr + page_offset, data, length);
+	unwritten = __copy_from_user_inatomic(vaddr + page_offset, data, length);
 	kunmap_atomic(vaddr, KM_USER0);
 
+	if (unwritten)
+		return -EFAULT;
 	return 0;
 }