NVMe: Poll device while still active during remove

A device failure or link down wouldn't have been detected during namespace
removal. This patch keeps the device in the list for polling so that the
thread may see such failure and initiate a reset. The device is removed
from the list after disable, so we can safely flush the reset work as
it can't be requeued when disable completes.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index e5c2bea01dbf55365aad109e0dd80c1f699dddfe..09cc4dafa32a9f5336410abb9a158ad32bb27dfe 100644 (file)
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2116,16 +2116,12 @@ static void nvme_remove(struct pci_dev *pdev)
 {
        struct nvme_dev *dev = pci_get_drvdata(pdev);
 
-       spin_lock(&dev_list_lock);
-       list_del_init(&dev->node);
-       spin_unlock(&dev_list_lock);
-
        pci_set_drvdata(pdev, NULL);
-       flush_work(&dev->reset_work);
        flush_work(&dev->scan_work);
        nvme_remove_namespaces(&dev->ctrl);
        nvme_uninit_ctrl(&dev->ctrl);
        nvme_dev_disable(dev, true);
+       flush_work(&dev->reset_work);
        nvme_dev_remove_admin(dev);
        nvme_free_queues(dev, 0);
        nvme_release_cmb(dev);