[PATCH] mpage_end_io_write() I/O error handling fix

When fsync() runs wait_on_page_writeback_range() it only inspects pages which
are actually under I/O (PAGECACHE_TAG_WRITEBACK).  If a page completed I/O
prior to wait_on_page_writeback_range() looking at it, it is supposed to have
recorded its I/O error state in the address_space.

But mpage_mpage_end_io_write() forgot to set the address_space error flag in
this case.

Signed-off-by: Qu Fuping <fs@ercist.iscas.ac.cn>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/fs/mpage.c b/fs/mpage.c
index b92c0e64aefa..bb9aebe93862 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -79,8 +79,11 @@ static int mpage_end_io_write(struct bio *bio, unsigned int bytes_done, int err)
                 if (--bvec >= bio->bi_io_vec)
                         prefetchw(&bvec->bv_page->flags);
 
-                if (!uptodate)
+                if (!uptodate){
                         SetPageError(page);
+                        if (page->mapping)
+                                set_bit(AS_EIO, &page->mapping->flags);
+                }
                 end_page_writeback(page);
         } while (bvec >= bio->bi_io_vec);
         bio_put(bio);