ext4: convert ext4_bread() to use the ERR_PTR convention

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index 0bb3f9e..c24143e 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -151,13 +151,11 @@
 					&file->f_ra, file,
 					index, 1);
 			file->f_ra.prev_pos = (loff_t)index << PAGE_CACHE_SHIFT;
-			bh = ext4_bread(NULL, inode, map.m_lblk, 0, &err);
+			bh = ext4_bread(NULL, inode, map.m_lblk, 0);
+			if (IS_ERR(bh))
+				return PTR_ERR(bh);
 		}
 
-		/*
-		 * We ignore I/O errors on directories so users have a chance
-		 * of recovering data when there's a bad sector
-		 */
 		if (!bh) {
 			if (!dir_has_error) {
 				EXT4_ERROR_FILE(file, 0,