tree fc2e8ba9515c9df6a651536b3cc00f4256f97852
parent c7f3888ad7f0932a87fb76e6e4edff2a90cc7920
author Al Viro <viro@zeniv.linux.org.uk> 1407515956 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1407774460 -0400

__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>