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virtio_blk: don't use req->errors 

Remove passing req->errors (which at that point is always 0) to
blk_mq_complete_request, and rely on the virtio status code for the
serial number passthrough request.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2017-04-20 16:03:00 +02:00 committed by Jens Axboe
parent a1a6e62b79
commit d19633d537
1 changed files with 3 additions and 7 deletions
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10
drivers/block/virtio_blk.c
View File

@ -175,19 +175,15 @@ static int virtblk_add_req(struct virtqueue *vq, struct virtblk_req *vbr,
static inline void virtblk_request_done(struct request *req)
{
struct virtblk_req *vbr = blk_mq_rq_to_pdu(req);
int error = virtblk_result(vbr);
switch (req_op(req)) {
case REQ_OP_SCSI_IN:
case REQ_OP_SCSI_OUT:
virtblk_scsi_request_done(req);
break;
case REQ_OP_DRV_IN:
req->errors = (error != 0);
break;
}
blk_mq_end_request(req, error);
blk_mq_end_request(req, virtblk_result(vbr));
}
static void virtblk_done(struct virtqueue *vq)
@ -205,7 +201,7 @@ static void virtblk_done(struct virtqueue *vq)
while ((vbr = virtqueue_get_buf(vblk->vqs[qid].vq, &len)) != NULL) {
struct request *req = blk_mq_rq_from_pdu(vbr);
blk_mq_complete_request(req, req->errors);
blk_mq_complete_request(req, 0);
req_done = true;
}
if (unlikely(virtqueue_is_broken(vq)))
@ -311,7 +307,7 @@ static int virtblk_get_id(struct gendisk *disk, char *id_str)
goto out;
blk_execute_rq(vblk->disk->queue, vblk->disk, req, false);
err = req->errors ? -EIO : 0;
err = virtblk_result(blk_mq_rq_to_pdu(req));
out:
blk_put_request(req);
return err;