nvme-rdma: split nvme_rdma_alloc_tagset

Split nvme_rdma_alloc_tagset into one helper for the admin tag_set and
one for the I/O tag set.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/nvme/host/rdma.c

@@ -787,15 +787,12 @@ static int nvme_rdma_alloc_io_queues(struct nvme_rdma_ctrl *ctrl)
 	return ret;
 }
 
-static struct blk_mq_tag_set *nvme_rdma_alloc_tagset(struct nvme_ctrl *nctrl,
-		bool admin)
+static int nvme_rdma_alloc_admin_tag_set(struct nvme_ctrl *nctrl)
 {
 	struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(nctrl);
-	struct blk_mq_tag_set *set;
+	struct blk_mq_tag_set *set = &ctrl->admin_tag_set;
 	int ret;
 
-	if (admin) {
-		set = &ctrl->admin_tag_set;
 	memset(set, 0, sizeof(*set));
 	set->ops = &nvme_rdma_admin_mq_ops;
 	set->queue_depth = NVME_AQ_MQ_TAG_DEPTH;
@@ -807,8 +804,18 @@ static struct blk_mq_tag_set *nvme_rdma_alloc_tagset(struct nvme_ctrl *nctrl,
 	set->nr_hw_queues = 1;
 	set->timeout = NVME_ADMIN_TIMEOUT;
 	set->flags = BLK_MQ_F_NO_SCHED;
-	} else {
-		set = &ctrl->tag_set;
+	ret = blk_mq_alloc_tag_set(set);
+	if (!ret)
+		ctrl->ctrl.admin_tagset = set;
+	return ret;
+}
+
+static int nvme_rdma_alloc_tag_set(struct nvme_ctrl *nctrl)
+{
+	struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(nctrl);
+	struct blk_mq_tag_set *set = &ctrl->tag_set;
+	int ret;
+
 	memset(set, 0, sizeof(*set));
 	set->ops = &nvme_rdma_mq_ops;
 	set->queue_depth = nctrl->sqsize + 1;
@@ -824,13 +831,10 @@ static struct blk_mq_tag_set *nvme_rdma_alloc_tagset(struct nvme_ctrl *nctrl,
 	set->nr_hw_queues = nctrl->queue_count - 1;
 	set->timeout = NVME_IO_TIMEOUT;
 	set->nr_maps = nctrl->opts->nr_poll_queues ? HCTX_MAX_TYPES : 2;
-	}
-
 	ret = blk_mq_alloc_tag_set(set);
-	if (ret)
-		return ERR_PTR(ret);
-
-	return set;
+	if (!ret)
+		ctrl->ctrl.tagset = set;
+	return ret;
 }
 
 static void nvme_rdma_destroy_admin_queue(struct nvme_rdma_ctrl *ctrl,
@@ -882,11 +886,9 @@ static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl,
 		goto out_free_queue;
 
 	if (new) {
-		ctrl->ctrl.admin_tagset = nvme_rdma_alloc_tagset(&ctrl->ctrl, true);
-		if (IS_ERR(ctrl->ctrl.admin_tagset)) {
-			error = PTR_ERR(ctrl->ctrl.admin_tagset);
+		error = nvme_rdma_alloc_admin_tag_set(&ctrl->ctrl);
+		if (error)
 			goto out_free_async_qe;
-		}
 
 		ctrl->ctrl.fabrics_q = blk_mq_init_queue(&ctrl->admin_tag_set);
 		if (IS_ERR(ctrl->ctrl.fabrics_q)) {
@@ -969,11 +971,9 @@ static int nvme_rdma_configure_io_queues(struct nvme_rdma_ctrl *ctrl, bool new)
 		return ret;
 
 	if (new) {
-		ctrl->ctrl.tagset = nvme_rdma_alloc_tagset(&ctrl->ctrl, false);
-		if (IS_ERR(ctrl->ctrl.tagset)) {
-			ret = PTR_ERR(ctrl->ctrl.tagset);
+		ret = nvme_rdma_alloc_tag_set(&ctrl->ctrl);
+		if (ret)
 			goto out_free_io_queues;
-		}
 
 		ret = nvme_ctrl_init_connect_q(&(ctrl->ctrl));
 		if (ret)