According to commit 865ffef3797da2cac85b3354b5b6050dc9660978
(fs: fix fsync() error reporting),
it's not stable to just check error pages because pages can be
truncated or invalidated, we should also mark mapping with error
flag so that a later fsync can catch the error.

Signed-off-by: Liu Bo <bo.li....@oracle.com>
---
 fs/btrfs/extent_io.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 80be17c..d7c7813 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2367,6 +2367,7 @@ int end_extent_writepage(struct page *page, int err, u64 
start, u64 end)
        if (!uptodate) {
                ClearPageUptodate(page);
                SetPageError(page);
+               mapping_set_error(page->mapping, ret);
        }
        return 0;
 }
@@ -3368,6 +3369,8 @@ done:
                set_page_writeback(page);
                end_page_writeback(page);
        }
+       if (PageError(page))
+               mapping_set_error(page->mapping, ret);
        unlock_page(page);
 
 done_unlocked:
-- 
1.8.1.4

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