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UPSTREAM: f2fs: avoid fsync() failure caused by EAGAIN in writepage()

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pageout() in MM traslates EAGAIN, so calls handle_write_error()
 -> mapping_set_error() -> set_bit(AS_EIO, ...).
 file_write_and_wait_range() will see EIO error, which is critical
 to return value of fsync() followed by atomic_write failure to user.

Change-Id: I6124ed299baf5e5b8993bb6b54f07bb8771eda8c
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
(cherry picked from commit 520a948618)
This commit is contained in:
Jaegeuk Kim
2018-05-03 23:26:02 -07:00
committed by Amit Pundir
parent ad402a7879
commit 4a862dde18
1 changed files with 7 additions and 1 deletions
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8
fs/f2fs/data.c
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@@ -1902,7 +1902,13 @@ out:
redirty_out:
redirty_page_for_writepage(wbc, page);
if (!err)
/*
* pageout() in MM traslates EAGAIN, so calls handle_write_error()
* -> mapping_set_error() -> set_bit(AS_EIO, ...).
* file_write_and_wait_range() will see EIO error, which is critical
* to return value of fsync() followed by atomic_write failure to user.
*/
if (!err || wbc->for_reclaim)
return AOP_WRITEPAGE_ACTIVATE;
unlock_page(page);
return err;