When backing device super block is written by bch_write_bdev_super(), the bio complete callback write_bdev_super_endio() simply ignores I/O status. Indeed such write request also contribute to backing device health status if the request failed.
This patch checkes bio->bi_status in write_bdev_super_endio(), if there is error, bch_count_backing_io_errors() will be called to count an I/O error to dc->io_errors. Signed-off-by: Coly Li <[email protected]> --- drivers/md/bcache/super.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index da9d6a63b81a..877113b62b0f 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -197,7 +197,9 @@ static const char *read_super(struct cache_sb *sb, struct block_device *bdev, static void write_bdev_super_endio(struct bio *bio) { struct cached_dev *dc = bio->bi_private; - /* XXX: error checking */ + + if (bio->bi_status) + bch_count_backing_io_errors(dc, bio); closure_put(&dc->sb_write); } -- 2.16.4
