block: silently error an unsupported barrier bio

This fixes a "regression" from 2.6.28, where the barrier probes that file
systems may do would trigger additional end request warnings in dmesg.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

parent dbdac9b7

block/blk-core.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -1451,6 +1451,11 @@ static inline void __generic_make_request(struct bio *bio)
		err = -EOPNOTSUPP;
		goto end_io;
		}
		if (bio_barrier(bio) && bio_has_data(bio) &&
		(q->next_ordered == QUEUE_ORDERED_NONE)) {
		err = -EOPNOTSUPP;
		goto end_io;
		}

		ret = q->make_request_fn(q, bio);
		} while (ret);