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nvme-pci: init shadow doorbell after each reset

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The spec states:

  "The settings are not retained across a Controller Level Reset"

Therefore the driver must enable the shadow doorbell, after each reset.

This was caught while testing the nvme driver over upcoming nvme-mdev
device.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Minwoo Im <minwoo.im@samsung.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Maxim Levitsky 2019-05-02 14:31:33 +03:00 committed by Christoph Hellwig
parent 936b33f724
commit e8fd41bb3c
1 changed files with 1 additions and 2 deletions
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3
drivers/nvme/host/pci.c
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@ -2280,8 +2280,6 @@ static int nvme_dev_add(struct nvme_dev *dev)
return ret;
}
dev->ctrl.tagset = &dev->tagset;
nvme_dbbuf_set(dev);
} else {
blk_mq_update_nr_hw_queues(&dev->tagset, dev->online_queues - 1);
@ -2289,6 +2287,7 @@ static int nvme_dev_add(struct nvme_dev *dev)
nvme_free_queues(dev, dev->online_queues);
}
nvme_dbbuf_set(dev);
return 0;
}