From: Christoph Hellwig <hch@lst.de>
Date: Thu, 21 Jul 2022 08:07:14 +0200
Subject: nvme-pci: split nvme_alloc_admin_tags
Patch-mainline: v6.0-rc1
Git-commit: f91b727ccf1fabe6c02dc184bb8a156f895428c8
References: jsc#PED-1183
Split nvme_alloc_admin_tags into a helper to actually allocate the
tag set, and one that just restarts the admin queue. Add a local
variable for the tag_set to clean up the code a bit.
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>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
drivers/nvme/host/pci.c | 64 ++++++++++++++++++++++++------------------------
1 file changed, 33 insertions(+), 31 deletions(-)
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1765,37 +1765,35 @@ static void nvme_dev_remove_admin(struct
}
}
-static int nvme_alloc_admin_tags(struct nvme_dev *dev)
+static int nvme_pci_alloc_admin_tag_set(struct nvme_dev *dev)
{
- if (!dev->ctrl.admin_q) {
- dev->admin_tagset.ops = &nvme_mq_admin_ops;
- dev->admin_tagset.nr_hw_queues = 1;
+ struct blk_mq_tag_set *set = &dev->admin_tagset;
- dev->admin_tagset.queue_depth = NVME_AQ_MQ_TAG_DEPTH;
- dev->admin_tagset.timeout = NVME_ADMIN_TIMEOUT;
- dev->admin_tagset.numa_node = dev->ctrl.numa_node;
- dev->admin_tagset.cmd_size = sizeof(struct nvme_iod);
- dev->admin_tagset.flags = BLK_MQ_F_NO_SCHED;
- dev->admin_tagset.driver_data = dev;
-
- if (blk_mq_alloc_tag_set(&dev->admin_tagset))
- return -ENOMEM;
- dev->ctrl.admin_tagset = &dev->admin_tagset;
-
- dev->ctrl.admin_q = blk_mq_init_queue(&dev->admin_tagset);
- if (IS_ERR(dev->ctrl.admin_q)) {
- blk_mq_free_tag_set(&dev->admin_tagset);
- dev->ctrl.admin_q = NULL;
- return -ENOMEM;
- }
- if (!blk_get_queue(dev->ctrl.admin_q)) {
- nvme_dev_remove_admin(dev);
- dev->ctrl.admin_q = NULL;
- return -ENODEV;
- }
- } else
- nvme_start_admin_queue(&dev->ctrl);
+ set->ops = &nvme_mq_admin_ops;
+ set->nr_hw_queues = 1;
+ set->queue_depth = NVME_AQ_MQ_TAG_DEPTH;
+ set->timeout = NVME_ADMIN_TIMEOUT;
+ set->numa_node = dev->ctrl.numa_node;
+ set->cmd_size = sizeof(struct nvme_iod);
+ set->flags = BLK_MQ_F_NO_SCHED;
+ set->driver_data = dev;
+
+ if (blk_mq_alloc_tag_set(set))
+ return -ENOMEM;
+ dev->ctrl.admin_tagset = set;
+
+ dev->ctrl.admin_q = blk_mq_init_queue(set);
+ if (IS_ERR(dev->ctrl.admin_q)) {
+ blk_mq_free_tag_set(set);
+ dev->ctrl.admin_q = NULL;
+ return -ENOMEM;
+ }
+ if (!blk_get_queue(dev->ctrl.admin_q)) {
+ nvme_dev_remove_admin(dev);
+ dev->ctrl.admin_q = NULL;
+ return -ENODEV;
+ }
return 0;
}
@@ -2838,9 +2836,13 @@ static void nvme_reset_work(struct work_
if (result)
goto out_unlock;
- result = nvme_alloc_admin_tags(dev);
- if (result)
- goto out_unlock;
+ if (!dev->ctrl.admin_q) {
+ result = nvme_pci_alloc_admin_tag_set(dev);
+ if (result)
+ goto out_unlock;
+ } else {
+ nvme_start_admin_queue(&dev->ctrl);
+ }
/*
* Limit the max command size to prevent iod->sg allocations going