diff options
| author | Keith Busch <keith.busch@intel.com> | 2015-11-26 12:21:29 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-12-22 09:38:32 -0700 |
| commit | 77bf25ea70200cddf083f74b7f617e5f07fac8bd (patch) | |
| tree | 91de4674f021f95780fe9d924de22108161b5c70 /drivers/nvme/host | |
| parent | 7385014c073263b077442439299fad013edd4409 (diff) | |
nvme: protect against simultaneous shutdown invocations
Signed-off-by: Keith Busch <keith.busch@intel.com>
[hch: split from a larger patch]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/nvme/host')
| -rw-r--r-- | drivers/nvme/host/pci.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index d82f08d671e6..ad6d5cce42d5 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -31,6 +31,7 @@ #include <linux/mm.h> #include <linux/module.h> #include <linux/moduleparam.h> +#include <linux/mutex.h> #include <linux/pci.h> #include <linux/poison.h> #include <linux/ptrace.h> @@ -113,6 +114,7 @@ struct nvme_dev { struct work_struct reset_work; struct work_struct probe_work; struct work_struct scan_work; + struct mutex shutdown_lock; bool subsystem; void __iomem *cmb; dma_addr_t cmb_dma_addr; @@ -2073,6 +2075,7 @@ static void nvme_dev_shutdown(struct nvme_dev *dev) nvme_dev_list_remove(dev); + mutex_lock(&dev->shutdown_lock); if (dev->bar) { nvme_freeze_queues(dev); csts = readl(dev->bar + NVME_REG_CSTS); @@ -2091,6 +2094,7 @@ static void nvme_dev_shutdown(struct nvme_dev *dev) for (i = dev->queue_count - 1; i >= 0; i--) nvme_clear_queue(dev->queues[i]); + mutex_unlock(&dev->shutdown_lock); } static int nvme_setup_prp_pools(struct nvme_dev *dev) @@ -2333,6 +2337,7 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) INIT_WORK(&dev->scan_work, nvme_dev_scan); INIT_WORK(&dev->probe_work, nvme_probe_work); INIT_WORK(&dev->reset_work, nvme_reset_work); + mutex_init(&dev->shutdown_lock); result = nvme_setup_prp_pools(dev); if (result) |