xfs: minor cleanup for xfs_get_blocks

Simplify the control flow a bit in preparation for O_ATOMIC-related
changes.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

fs/xfs/xfs_aops.c

@@ -1335,17 +1335,16 @@ xfs_get_blocks(
 			&nimaps, 0);
 	if (error)
 		goto out_unlock;
-
-	if (nimaps) {
-		trace_xfs_get_blocks_found(ip, offset, size,
-			imap.br_state == XFS_EXT_UNWRITTEN ?
-				XFS_IO_UNWRITTEN : XFS_IO_OVERWRITE, &imap);
-		xfs_iunlock(ip, lockmode);
-	} else {
+	if (!nimaps) {
 		trace_xfs_get_blocks_notfound(ip, offset, size);
 		goto out_unlock;
 	}
 
+	trace_xfs_get_blocks_found(ip, offset, size,
+		imap.br_state == XFS_EXT_UNWRITTEN ?
+			XFS_IO_UNWRITTEN : XFS_IO_OVERWRITE, &imap);
+	xfs_iunlock(ip, lockmode);
+
 	/* trim mapping down to size requested */
 	xfs_map_trim_size(inode, iblock, bh_result, &imap, offset, size);