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    Subject[PATCH 5.3 071/180] dm writecache: handle REQ_FUA
    Date
    From: Maged Mokhtar <mmokhtar@petasan.org>

    commit c1005322ff02110a4df7f0033368ea015062b583 upstream.

    Call writecache_flush() on REQ_FUA in writecache_map().

    Cc: stable@vger.kernel.org # 4.18+
    Signed-off-by: Maged Mokhtar <mmokhtar@petasan.org>
    Acked-by: Mikulas Patocka <mpatocka@redhat.com>
    Signed-off-by: Mike Snitzer <snitzer@redhat.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/md/dm-writecache.c | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    --- a/drivers/md/dm-writecache.c
    +++ b/drivers/md/dm-writecache.c
    @@ -1218,7 +1218,8 @@ bio_copy:
    }
    } while (bio->bi_iter.bi_size);

    - if (unlikely(wc->uncommitted_blocks >= wc->autocommit_blocks))
    + if (unlikely(bio->bi_opf & REQ_FUA ||
    + wc->uncommitted_blocks >= wc->autocommit_blocks))
    writecache_flush(wc);
    else
    writecache_schedule_autocommit(wc);

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