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blk-mq: move the call to blk_put_queue out of blk_mq_destroy_queue

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The fact that blk_mq_destroy_queue also drops a queue reference leads
to various places having to grab an extra reference.  Move the call to
blk_put_queue into the callers to allow removing the extra references.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20221018135720.670094-2-hch@lst.de
[axboe: fix fabrics_q vs admin_q conflict in nvme core.c]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2022-10-18 15:57:17 +02:00 committed by Jens Axboe
parent 8ed40ee35d
commit 2b3f056f72
7 changed files with 16 additions and 5 deletions
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4
block/blk-mq.c
View file

@ -4010,9 +4010,6 @@ void blk_mq_destroy_queue(struct request_queue *q)
blk_sync_queue(q);
blk_mq_cancel_work_sync(q);
blk_mq_exit_queue(q);
/* @q is and will stay empty, shutdown and put */
blk_put_queue(q);
}
EXPORT_SYMBOL(blk_mq_destroy_queue);
@ -4029,6 +4026,7 @@ struct gendisk *__blk_mq_alloc_disk(struct blk_mq_tag_set *set, void *queuedata,
disk = __alloc_disk_node(q, set->numa_node, lkclass);
if (!disk) {
blk_mq_destroy_queue(q);
blk_put_queue(q);
return ERR_PTR(-ENOMEM);
}
set_bit(GD_OWNS_QUEUE, &disk->state);

2
block/bsg-lib.c
View file

@ -325,6 +325,7 @@ void bsg_remove_queue(struct request_queue *q)
bsg_unregister_queue(bset->bd);
blk_mq_destroy_queue(q);
blk_put_queue(q);
blk_mq_free_tag_set(&bset->tag_set);
kfree(bset);
}
@ -400,6 +401,7 @@ struct request_queue *bsg_setup_queue(struct device *dev, const char *name,
return q;
out_cleanup_queue:
blk_mq_destroy_queue(q);
blk_put_queue(q);
out_queue:
blk_mq_free_tag_set(set);
out_tag_set:

1
drivers/nvme/host/apple.c
View file

@ -1510,6 +1510,7 @@ static int apple_nvme_probe(struct platform_device *pdev)
if (!blk_get_queue(anv->ctrl.admin_q)) {
nvme_start_admin_queue(&anv->ctrl);
blk_mq_destroy_queue(anv->ctrl.admin_q);
blk_put_queue(anv->ctrl.admin_q);
anv->ctrl.admin_q = NULL;
ret = -ENODEV;
goto put_dev;

10
drivers/nvme/host/core.c
View file

@ -4851,6 +4851,7 @@ int nvme_alloc_admin_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set,
out_cleanup_admin_q:
blk_mq_destroy_queue(ctrl->admin_q);
blk_put_queue(ctrl->admin_q);
out_free_tagset:
blk_mq_free_tag_set(ctrl->admin_tagset);
return ret;
@ -4860,8 +4861,11 @@ EXPORT_SYMBOL_GPL(nvme_alloc_admin_tag_set);
void nvme_remove_admin_tag_set(struct nvme_ctrl *ctrl)
{
blk_mq_destroy_queue(ctrl->admin_q);
if (ctrl->ops->flags & NVME_F_FABRICS)
blk_put_queue(ctrl->admin_q);
if (ctrl->ops->flags & NVME_F_FABRICS) {
blk_mq_destroy_queue(ctrl->fabrics_q);
blk_put_queue(ctrl->fabrics_q);
}
blk_mq_free_tag_set(ctrl->admin_tagset);
}
EXPORT_SYMBOL_GPL(nvme_remove_admin_tag_set);
@ -4907,8 +4911,10 @@ EXPORT_SYMBOL_GPL(nvme_alloc_io_tag_set);
void nvme_remove_io_tag_set(struct nvme_ctrl *ctrl)
{
if (ctrl->ops->flags & NVME_F_FABRICS)
if (ctrl->ops->flags & NVME_F_FABRICS) {
blk_mq_destroy_queue(ctrl->connect_q);
blk_put_queue(ctrl->connect_q);
}
blk_mq_free_tag_set(ctrl->tagset);
}
EXPORT_SYMBOL_GPL(nvme_remove_io_tag_set);

1
drivers/nvme/host/pci.c
View file

@ -1749,6 +1749,7 @@ static void nvme_dev_remove_admin(struct nvme_dev *dev)
*/
nvme_start_admin_queue(&dev->ctrl);
blk_mq_destroy_queue(dev->ctrl.admin_q);
blk_put_queue(dev->ctrl.admin_q);
blk_mq_free_tag_set(&dev->admin_tagset);
}
}

1
drivers/scsi/scsi_sysfs.c
View file

@ -1486,6 +1486,7 @@ void __scsi_remove_device(struct scsi_device *sdev)
mutex_unlock(&sdev->state_mutex);
blk_mq_destroy_queue(sdev->request_queue);
blk_put_queue(sdev->request_queue);
kref_put(&sdev->host->tagset_refcnt, scsi_mq_free_tags);
cancel_work_sync(&sdev->requeue_work);

2
drivers/ufs/core/ufshcd.c
View file

@ -9544,6 +9544,7 @@ void ufshcd_remove(struct ufs_hba *hba)
ufshpb_remove(hba);
ufs_sysfs_remove_nodes(hba->dev);
blk_mq_destroy_queue(hba->tmf_queue);
blk_put_queue(hba->tmf_queue);
blk_mq_free_tag_set(&hba->tmf_tag_set);
scsi_remove_host(hba->host);
/* disable interrupts */
@ -9840,6 +9841,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
free_tmf_queue:
blk_mq_destroy_queue(hba->tmf_queue);
blk_put_queue(hba->tmf_queue);
free_tmf_tag_set:
blk_mq_free_tag_set(&hba->tmf_tag_set);
out_remove_scsi_host: