md: check return code of read_sb_page

Function read_sb_page may return ERR_PTR(...). Check for it. Signed-off-by: Vasiliy Kulikov <[email protected]> Cc: Neil Brown <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: NeilBrown <[email protected]>
liveeasily · Oct 7, 2010 · 5c04f55 · 5c04f55
1 parent db8d9d3
commit 5c04f55
Showing 1 changed file with 5 additions and 4 deletions.
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
@@ -1000,10 +1000,11 @@ static int bitmap_init_from_disk(struct bitmap *bitmap, sector_t start)
 				page = bitmap->sb_page;
 				offset = sizeof(bitmap_super_t);
 				if (!file)
-					read_sb_page(bitmap->mddev,
-						     bitmap->mddev->bitmap_info.offset,
-						     page,
-						     index, count);
+					page = read_sb_page(
+						bitmap->mddev,
+						bitmap->mddev->bitmap_info.offset,
+						page,
+						index, count);
 			} else if (file) {
 				page = read_page(file, index, bitmap, count);
 				offset = 0;