diff options
| author | Christoph Hellwig <hch@lst.de> | 2015-11-26 12:35:49 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-12-22 09:38:33 -0700 |
| commit | 5c8809e650772be87ba04595a8ccf278bab7b543 (patch) | |
| tree | f8ae9d553aa720450a679c62b0f097c69d892856 /drivers/nvme | |
| parent | fd634f4142861e533ac57e88ece8e98ab5851edb (diff) | |
| download | linux-5c8809e650772be87ba04595a8ccf278bab7b543.tar.bz2 | |
nvme: remove dead controllers from a work item
Compared to the kthread this gives us multiple call prevention for free.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/pci.c | 22 |
1 files changed, 9 insertions, 13 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 23cbd93c0c56..26e982359a74 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -80,7 +80,7 @@ struct nvme_iod; static int nvme_reset(struct nvme_dev *dev); static void nvme_process_cq(struct nvme_queue *nvmeq); static void nvme_unmap_data(struct nvme_dev *dev, struct nvme_iod *iod); -static void nvme_dead_ctrl(struct nvme_dev *dev); +static void nvme_remove_dead_ctrl(struct nvme_dev *dev); static void nvme_dev_shutdown(struct nvme_dev *dev); struct async_cmd_info { @@ -113,6 +113,7 @@ struct nvme_dev { void __iomem *bar; struct work_struct reset_work; struct work_struct scan_work; + struct work_struct remove_work; struct mutex shutdown_lock; bool subsystem; void __iomem *cmb; @@ -2218,31 +2219,25 @@ static void nvme_reset_work(struct work_struct *work) unmap: nvme_dev_unmap(dev); out: - if (!work_pending(&dev->reset_work)) - nvme_dead_ctrl(dev); + nvme_remove_dead_ctrl(dev); } -static int nvme_remove_dead_ctrl(void *arg) +static void nvme_remove_dead_ctrl_work(struct work_struct *work) { - struct nvme_dev *dev = (struct nvme_dev *)arg; + struct nvme_dev *dev = container_of(work, struct nvme_dev, remove_work); struct pci_dev *pdev = to_pci_dev(dev->dev); if (pci_get_drvdata(pdev)) pci_stop_and_remove_bus_device_locked(pdev); nvme_put_ctrl(&dev->ctrl); - return 0; } -static void nvme_dead_ctrl(struct nvme_dev *dev) +static void nvme_remove_dead_ctrl(struct nvme_dev *dev) { - dev_warn(dev->dev, "Device failed to resume\n"); + dev_warn(dev->dev, "Removing after probe failure\n"); kref_get(&dev->ctrl.kref); - if (IS_ERR(kthread_run(nvme_remove_dead_ctrl, dev, "nvme%d", - dev->ctrl.instance))) { - dev_err(dev->dev, - "Failed to start controller remove task\n"); + if (!schedule_work(&dev->remove_work)) nvme_put_ctrl(&dev->ctrl); - } } static int nvme_reset(struct nvme_dev *dev) @@ -2323,6 +2318,7 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) INIT_LIST_HEAD(&dev->node); INIT_WORK(&dev->scan_work, nvme_dev_scan); INIT_WORK(&dev->reset_work, nvme_reset_work); + INIT_WORK(&dev->remove_work, nvme_remove_dead_ctrl_work); mutex_init(&dev->shutdown_lock); result = nvme_setup_prp_pools(dev); |