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block: needs to set the residual length of a bidi request 

Tejun's "block: set rq->resid_len to blk_rq_bytes() on issue" patch
seems to be incomplete; It doesn't set rq->resid_len to blk_rq_bytes()
for a bidi request (req->next_rq). As a result, all bidi users are
broken.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
FUJITA Tomonori 2009-06-09 05:47:10 +02:00 committed by Jens Axboe
parent 172124e220
commit dbb66c4be0
1 changed files with 3 additions and 0 deletions
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3
block/blk-core.c
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@ -1846,6 +1846,9 @@ void blk_start_request(struct request *req)
* resid_len to full count and add the timeout handler.
*/
req->resid_len = blk_rq_bytes(req);
if (unlikely(blk_bidi_rq(req)))
req->next_rq->resid_len = blk_rq_bytes(req->next_rq);
blk_add_timer(req);
}
EXPORT_SYMBOL(blk_start_request);