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block: ublk_drv: don't consider flush request in map/unmap io 

There isn't data in request of REQ_OP_FLUSH always, so don't consider
it in both ublk_map_io() and ublk_unmap_io().

Reviewed-by: Ziyang Zhang <ZiyangZhang@linux.alibaba.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ming Lei 2023-03-30 19:36:21 +08:00 committed by Jens Axboe
parent 903f8aeea9
commit 23ef8220f2
1 changed files with 3 additions and 7 deletions
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10
drivers/block/ublk_drv.c
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@ -529,15 +529,13 @@ static int ublk_map_io(const struct ublk_queue *ubq, const struct request *req,
struct ublk_io *io)
{
const unsigned int rq_bytes = blk_rq_bytes(req);
/*
* no zero copy, we delay copy WRITE request data into ublksrv
* context and the big benefit is that pinning pages in current
* context is pretty fast, see ublk_pin_user_pages
*/
if (req_op(req) != REQ_OP_WRITE && req_op(req) != REQ_OP_FLUSH)
return rq_bytes;
if (ublk_rq_has_data(req)) {
if (ublk_rq_has_data(req) && req_op(req) == REQ_OP_WRITE) {
struct ublk_map_data data = {
.ubq = ubq,
.rq = req,
@ -772,9 +770,7 @@ static inline void __ublk_rq_task_work(struct request *req)
return;
}
if (ublk_need_get_data(ubq) &&
(req_op(req) == REQ_OP_WRITE ||
req_op(req) == REQ_OP_FLUSH)) {
if (ublk_need_get_data(ubq) && (req_op(req) == REQ_OP_WRITE)) {
/*
* We have not handled UBLK_IO_NEED_GET_DATA command yet,
* so immepdately pass UBLK_IO_RES_NEED_GET_DATA to ublksrv