Commit 60bb4529 authored Aug 08, 2014 by Al Viro

__generic_file_write_iter(): fix handling of sync error after DIO



If DIO results in short write and sync write fails, we want to bugger off
whether the DIO part has written anything or not; the logics on the return
will take care of the right return value.

Cc: stable@vger.kernel.org [3.16]
Reported-by: Anton Altaparmakov <aia21@cam.ac.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

parent c7f3888a

mm/filemap.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2584,7 +2584,7 @@ ssize_t __generic_file_write_iter(struct kiocb iocb, struct iov_iter from)
		* that this differs from normal direct-io semantics, which
		* will return -EFOO even if some bytes were written.
		*/
		if (unlikely(status < 0) && !written) {
		if (unlikely(status < 0)) {
		err = status;
		goto out;
		}