diff options
| -rw-r--r-- | drivers/block/nvme-core.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c index 8fffc68c74eb..fb21d365efb5 100644 --- a/drivers/block/nvme-core.c +++ b/drivers/block/nvme-core.c @@ -1832,11 +1832,18 @@ static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, static int nvme_open(struct block_device *bdev, fmode_t mode) { - struct nvme_ns *ns = bdev->bd_disk->private_data; - struct nvme_dev *dev = ns->dev; + int ret = 0; + struct nvme_ns *ns; - kref_get(&dev->kref); - return 0; + spin_lock(&dev_list_lock); + ns = bdev->bd_disk->private_data; + if (!ns) + ret = -ENXIO; + else if (!kref_get_unless_zero(&ns->dev->kref)) + ret = -ENXIO; + spin_unlock(&dev_list_lock); + + return ret; } static void nvme_free_dev(struct kref *kref); @@ -2711,6 +2718,11 @@ static void nvme_free_namespaces(struct nvme_dev *dev) list_for_each_entry_safe(ns, next, &dev->namespaces, list) { list_del(&ns->list); + + spin_lock(&dev_list_lock); + ns->disk->private_data = NULL; + spin_unlock(&dev_list_lock); + put_disk(ns->disk); kfree(ns); } |
