[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>

diff --git a/fs/mpage.c b/fs/mpage.c
index b92c0e6..bb9aebe 100644 (file)
--- 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);