提交 51fd77bd 编写于 作者: J Jens Axboe

[BLOCK] Don't allow empty barriers to be passed down to queues that don't grok them

Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
上级 5ec140e6
......@@ -3221,6 +3221,7 @@ static inline void __generic_make_request(struct bio *bio)
sector_t old_sector;
int ret, nr_sectors = bio_sectors(bio);
dev_t old_dev;
int err = -EIO;
might_sleep();
......@@ -3248,7 +3249,7 @@ static inline void __generic_make_request(struct bio *bio)
bdevname(bio->bi_bdev, b),
(long long) bio->bi_sector);
end_io:
bio_endio(bio, -EIO);
bio_endio(bio, err);
break;
}
......@@ -3283,6 +3284,10 @@ static inline void __generic_make_request(struct bio *bio)
if (bio_check_eod(bio, nr_sectors))
goto end_io;
if (bio_empty_barrier(bio) && !q->prepare_flush_fn) {
err = -EOPNOTSUPP;
goto end_io;
}
ret = q->make_request_fn(q, bio);
} while (ret);
......
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