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blk-mq: Make blk_mq_reinit_tagset() calls easier to read

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Since blk_mq_ops.reinit_request is only called from inside
blk_mq_reinit_tagset(), make this function pointer an argument of
blk_mq_reinit_tagset() instead of a member of struct blk_mq_ops.
This patch does not change any functionality but makes
blk_mq_reinit_tagset() calls easier to read and to analyze.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: James Smart <james.smart@broadcom.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Bart Van Assche 2017-08-17 16:23:03 -07:00 committed by Jens Axboe
parent 37f02e5fb3
commit d352ae205d
4 changed files with 14 additions and 15 deletions
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9
block/blk-mq-tag.c
View file

@ -298,11 +298,12 @@ void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset,
}
EXPORT_SYMBOL(blk_mq_tagset_busy_iter);
int blk_mq_reinit_tagset(struct blk_mq_tag_set *set)
int blk_mq_reinit_tagset(struct blk_mq_tag_set *set,
int (reinit_request)(void *, struct request *))
{
int i, j, ret = 0;
if (!set->ops->reinit_request)
if (WARN_ON_ONCE(!reinit_request))
goto out;
for (i = 0; i < set->nr_hw_queues; i++) {
@ -315,8 +316,8 @@ int blk_mq_reinit_tagset(struct blk_mq_tag_set *set)
if (!tags->static_rqs[j])
continue;
ret = set->ops->reinit_request(set->driver_data,
tags->static_rqs[j]);
ret = reinit_request(set->driver_data,
tags->static_rqs[j]);
if (ret)
goto out;
}

4
drivers/nvme/host/fc.c
View file

@ -2168,7 +2168,6 @@ static const struct blk_mq_ops nvme_fc_mq_ops = {
.complete = nvme_fc_complete_rq,
.init_request = nvme_fc_init_request,
.exit_request = nvme_fc_exit_request,
.reinit_request = nvme_fc_reinit_request,
.init_hctx = nvme_fc_init_hctx,
.poll = nvme_fc_poll,
.timeout = nvme_fc_timeout,
@ -2269,7 +2268,7 @@ nvme_fc_reinit_io_queues(struct nvme_fc_ctrl *ctrl)
nvme_fc_init_io_queues(ctrl);
ret = blk_mq_reinit_tagset(&ctrl->tag_set);
ret = blk_mq_reinit_tagset(&ctrl->tag_set, nvme_fc_reinit_request);
if (ret)
goto out_free_io_queues;
@ -2655,7 +2654,6 @@ static const struct blk_mq_ops nvme_fc_admin_mq_ops = {
.complete = nvme_fc_complete_rq,
.init_request = nvme_fc_init_request,
.exit_request = nvme_fc_exit_request,
.reinit_request = nvme_fc_reinit_request,
.init_hctx = nvme_fc_init_admin_hctx,
.timeout = nvme_fc_timeout,
};

11
drivers/nvme/host/rdma.c
View file

@ -704,14 +704,16 @@ static void nvme_rdma_reconnect_ctrl_work(struct work_struct *work)
if (ctrl->ctrl.queue_count > 1) {
nvme_rdma_free_io_queues(ctrl);
ret = blk_mq_reinit_tagset(&ctrl->tag_set);
ret = blk_mq_reinit_tagset(&ctrl->tag_set,
nvme_rdma_reinit_request);
if (ret)
goto requeue;
}
nvme_rdma_stop_and_free_queue(&ctrl->queues[0]);
ret = blk_mq_reinit_tagset(&ctrl->admin_tag_set);
ret = blk_mq_reinit_tagset(&ctrl->admin_tag_set,
nvme_rdma_reinit_request);
if (ret)
goto requeue;
@ -1503,7 +1505,6 @@ static const struct blk_mq_ops nvme_rdma_mq_ops = {
.complete = nvme_rdma_complete_rq,
.init_request = nvme_rdma_init_request,
.exit_request = nvme_rdma_exit_request,
.reinit_request = nvme_rdma_reinit_request,
.init_hctx = nvme_rdma_init_hctx,
.poll = nvme_rdma_poll,
.timeout = nvme_rdma_timeout,
@ -1514,7 +1515,6 @@ static const struct blk_mq_ops nvme_rdma_admin_mq_ops = {
.complete = nvme_rdma_complete_rq,
.init_request = nvme_rdma_init_request,
.exit_request = nvme_rdma_exit_request,
.reinit_request = nvme_rdma_reinit_request,
.init_hctx = nvme_rdma_init_admin_hctx,
.timeout = nvme_rdma_timeout,
};
@ -1712,7 +1712,8 @@ static void nvme_rdma_reset_ctrl_work(struct work_struct *work)
}
if (ctrl->ctrl.queue_count > 1) {
ret = blk_mq_reinit_tagset(&ctrl->tag_set);
ret = blk_mq_reinit_tagset(&ctrl->tag_set,
nvme_rdma_reinit_request);
if (ret)
goto del_dead_ctrl;

5
include/linux/blk-mq.h
View file

@ -97,7 +97,6 @@ typedef int (init_request_fn)(struct blk_mq_tag_set *set, struct request *,
unsigned int, unsigned int);
typedef void (exit_request_fn)(struct blk_mq_tag_set *set, struct request *,
unsigned int);
typedef int (reinit_request_fn)(void *, struct request *);
typedef void (busy_iter_fn)(struct blk_mq_hw_ctx *, struct request *, void *,
bool);
@ -143,7 +142,6 @@ struct blk_mq_ops {
*/
init_request_fn *init_request;
exit_request_fn *exit_request;
reinit_request_fn *reinit_request;
/* Called from inside blk_get_request() */
void (*initialize_rq_fn)(struct request *rq);
@ -261,7 +259,8 @@ void blk_freeze_queue_start(struct request_queue *q);
void blk_mq_freeze_queue_wait(struct request_queue *q);
int blk_mq_freeze_queue_wait_timeout(struct request_queue *q,
unsigned long timeout);
int blk_mq_reinit_tagset(struct blk_mq_tag_set *set);
int blk_mq_reinit_tagset(struct blk_mq_tag_set *set,
int (reinit_request)(void *, struct request *));
int blk_mq_map_queues(struct blk_mq_tag_set *set);
void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues);