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NVMe: Remove device management handles on remove 

We don't want to allow new references to open on a device that is
removed. This ties the lifetime of these handles to the physical device's
presence rather than to the open reference count.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Keith Busch 2015-11-28 15:41:02 +01:00 committed by Jens Axboe
parent 92f7a1624b
commit 53029b0441
3 changed files with 11 additions and 4 deletions
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13
drivers/nvme/host/core.c
View File

@ -1200,17 +1200,22 @@ static void nvme_release_instance(struct nvme_ctrl *ctrl)
spin_unlock(&dev_list_lock);
}
static void nvme_free_ctrl(struct kref *kref)
{
struct nvme_ctrl *ctrl = container_of(kref, struct nvme_ctrl, kref);
void nvme_uninit_ctrl(struct nvme_ctrl *ctrl)
{
device_remove_file(ctrl->device, &dev_attr_reset_controller);
device_destroy(nvme_class, MKDEV(nvme_char_major, ctrl->instance));
spin_lock(&dev_list_lock);
list_del(&ctrl->node);
spin_unlock(&dev_list_lock);
}
static void nvme_free_ctrl(struct kref *kref)
{
struct nvme_ctrl *ctrl = container_of(kref, struct nvme_ctrl, kref);
put_device(ctrl->device);
nvme_release_instance(ctrl);
device_destroy(nvme_class, MKDEV(nvme_char_major, ctrl->instance));
ctrl->ops->free_ctrl(ctrl);
}

1
drivers/nvme/host/nvme.h
View File

@ -221,6 +221,7 @@ int nvme_enable_ctrl(struct nvme_ctrl *ctrl, u64 cap);
int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl);
int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
const struct nvme_ctrl_ops *ops, unsigned long quirks);
void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);
void nvme_put_ctrl(struct nvme_ctrl *ctrl);
int nvme_init_identify(struct nvme_ctrl *ctrl);

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

@ -2373,6 +2373,7 @@ static void nvme_remove(struct pci_dev *pdev)
flush_work(&dev->reset_work);
flush_work(&dev->scan_work);
nvme_remove_namespaces(&dev->ctrl);
nvme_uninit_ctrl(&dev->ctrl);
nvme_dev_shutdown(dev);
nvme_dev_remove_admin(dev);
nvme_free_queues(dev, 0);