From cec0707e40ae25794b5a2de7b7f03c51961f80d9 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Tue, 13 Jan 2009 15:28:32 +0100 Subject: [PATCH] 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 --- block/blk-core.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/block/blk-core.c b/block/blk-core.c index 9e2e86fb78b8..ae75c047f45d 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -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); -- 2.20.1