diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 6de7ff9faf2d..b55c2a8a547c 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1860,9 +1860,11 @@ st_map_user_pages(struct scatterlist *sgl, const unsigned int max_pages,
 	   unlock_page(pages[j]); */
 	res = 0;
  out_unmap:
-	if (res > 0)
+	if (res > 0) {
 		for (j=0; j < res; j++)
 			page_cache_release(pages[j]);
+		res = 0;
+	}
 	kfree(pages);
 	return res;
 }