[PATCH] ext4 balloc: use io_error label

ext4_new_blocks has a nice io_error label for setting -EIO, so goto that in
the one place that doesn't already use it.

Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/ext4/balloc.c

@@ -1529,10 +1529,8 @@ ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
 		if (group_no >= ngroups)
 			group_no = 0;
 		gdp = ext4_get_group_desc(sb, group_no, &gdp_bh);
-		if (!gdp) {
-			*errp = -EIO;
-			goto out;
-		}
+		if (!gdp)
+			goto io_error;
 		free_blocks = le16_to_cpu(gdp->bg_free_blocks_count);
 		/*
 		 * skip this group if the number of