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Bottomley" , "Martin K. Petersen" , Alim Akhtar , Avri Altman , Bart Van Assche , Sasha Levin , Peter Wang , Greg Kroah-Hartman , Adrian Hunter , Thomas Yen , Brian Kao , Seunghui Lee , Sanjeev Yadav , Wonkon Kim , Ming Lei , Hannes Reinecke , "linux-block@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "asahi@lists.linux.dev" , "linux-arm-kernel@lists.infradead.org" , "linux-nvme@lists.infradead.org" , "linux-scsi@vger.kernel.org" Subject: [PATCH 6.1.y v2 2/6] blk-mq: move the call to blk_put_queue out of blk_mq_destroy_queue Thread-Topic: [PATCH 6.1.y v2 2/6] blk-mq: move the call to blk_put_queue out of blk_mq_destroy_queue Thread-Index: AQHcwqich41sprKN6EWvyx0ADvz7kg== Date: Thu, 2 Apr 2026 13:57:15 +0000 Message-ID: <20260402-model-paradox-ae8cef60@mheyne-amazon> References: <20260402-moral-jockey-f072379b@mheyne-amazon> In-Reply-To: <20260402-moral-jockey-f072379b@mheyne-amazon> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Christoph Hellwig [ Upstream commit 2b3f056f72e56fa07df69b4705e0b46a6c08e77c ] 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 Reviewed-by: Sagi Grimberg Reviewed-by: Chaitanya Kulkarni Reviewed-by: Keith Busch 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 Stable-dep-of: 03b3bcd319b3 ("nvme: fix admin request_queue lifetime") Signed-off-by: Maximilian Heyne --- block/blk-mq.c | 4 +--- block/bsg-lib.c | 2 ++ drivers/nvme/host/apple.c | 1 + drivers/nvme/host/core.c | 10 ++++++++-- drivers/nvme/host/pci.c | 1 + drivers/scsi/scsi_sysfs.c | 1 + drivers/ufs/core/ufshcd.c | 2 ++ 7 files changed, 16 insertions(+), 5 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index a9697541d67f9..8b9e5ca398242 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -4194,9 +4194,6 @@ 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); =20 @@ -4213,6 +4210,7 @@ struct gendisk *__blk_mq_alloc_disk(struct blk_mq_tag= _set *set, void *queuedata, disk =3D __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); diff --git a/block/bsg-lib.c b/block/bsg-lib.c index d6f5dcdce748c..435c32373cd68 100644 --- a/block/bsg-lib.c +++ b/block/bsg-lib.c @@ -325,6 +325,7 @@ void bsg_remove_queue(struct request_queue *q) =20 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 *de= v, 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: diff --git a/drivers/nvme/host/apple.c b/drivers/nvme/host/apple.c index 262d2b60ac6dd..c5fc293c22123 100644 --- a/drivers/nvme/host/apple.c +++ b/drivers/nvme/host/apple.c @@ -1510,6 +1510,7 @@ static int apple_nvme_probe(struct platform_device *p= dev) 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 =3D NULL; ret =3D -ENODEV; goto put_dev; diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 938af571dc13e..044e1a9c099b3 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -5031,6 +5031,7 @@ int nvme_alloc_admin_tag_set(struct nvme_ctrl *ctrl, = struct blk_mq_tag_set *set, =20 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(set); ctrl->admin_q =3D NULL; @@ -5042,8 +5043,11 @@ 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); @@ -5099,8 +5103,10 @@ EXPORT_SYMBOL_GPL(nvme_alloc_io_tag_set); =20 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); diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 518f8c5012bdf..727585f580362 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1782,6 +1782,7 @@ static void nvme_dev_remove_admin(struct nvme_dev *de= v) */ 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); } } diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index 456b92c3a7811..af81b2ba0c9b3 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -1486,6 +1486,7 @@ void __scsi_remove_device(struct scsi_device *sdev) mutex_unlock(&sdev->state_mutex); =20 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); =20 diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index f72ba0b206437..a39ffc62d88a1 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -9651,6 +9651,7 @@ 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 */ @@ -9953,6 +9954,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mm= io_base, unsigned int irq) =20 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: --=20 2.50.1 Amazon Web Services Development Center Germany GmbH Tamara-Danz-Str. 13 10243 Berlin Geschaeftsfuehrung: Christof Hellmis, Andreas Stieger Eingetragen am Amtsgericht Charlottenburg unter HRB 257764 B Sitz: Berlin Ust-ID: DE 365 538 597