ext4: get rid of code duplication

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 65cca28..eab825f 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3155,9 +3155,8 @@
 			 "start %lu, size %lu, fe_logical %lu",
 			 (unsigned long) start, (unsigned long) size,
 			 (unsigned long) ac->ac_o_ex.fe_logical);
+		BUG();
 	}
-	BUG_ON(start + size <= ac->ac_o_ex.fe_logical &&
-			start > ac->ac_o_ex.fe_logical);
 	BUG_ON(size <= 0 || size > EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
 
 	/* now prepare goal request */