fs/direct-io.c: remove some left over checks

We know that "ret > 0" is true here.  These tests were left over from
commit 02afc27faec9 ('direct-io: Handle O_(D)SYNC AIO') and aren't
needed any more.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 1a50739..6db7f7d 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -153,7 +153,7 @@
 		ssize_t err;
 
 		err = generic_write_sync(file, iocb->ki_pos - ret, ret);
-		if (err < 0 && ret > 0)
+		if (err < 0)
 			ret = err;
 	}
 	blk_finish_plug(&plug);