Btrfs: add missing end_page_writeback on submit_extent_page failure

If submit_extent_page() fails in write_one_eb(), we end up with the current
page not marked dirty anymore, unlocked and marked for writeback. But we never
end up calling end_page_writeback() against the page, which will make calls to
filemap_fdatawait_range (e.g. at transaction commit time) hang forever waiting
for the writeback bit to be cleared from the page.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 78229007f99e..828aded0f8aa 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3663,6 +3663,7 @@ static noinline_for_stack int write_one_eb(struct extent_buffer *eb,
                 if (ret) {
                         set_bit(EXTENT_BUFFER_IOERR, &eb->bflags);
                         SetPageError(p);
+                        end_page_writeback(p);
                         if (atomic_sub_and_test(num_pages - i, &eb->io_pages))
                                 end_extent_buffer_writeback(eb);
                         ret = -EIO;