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nvme-pci: set doorbell config before unquiescing

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During resets, if queues are unquiesced first, then the host can submit
IOs to the controller using shadow doorbell logic but the controller
won't be aware. This can lead to necessary MMIO doorbells from being
not issued, causing requests to be delayed and timed-out.

Signed-off-by: William Butler <wab@google.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
William Butler 2024-01-10 18:28:55 +00:00 committed by Keith Busch
parent 9a1abc2485
commit 06c59d4270
1 changed files with 1 additions and 1 deletions
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2
drivers/nvme/host/pci.c
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@ -2746,10 +2746,10 @@ static void nvme_reset_work(struct work_struct *work)
* controller around but remove all namespaces.
*/
if (dev->online_queues > 1) {
nvme_dbbuf_set(dev);
nvme_unquiesce_io_queues(&dev->ctrl);
nvme_wait_freeze(&dev->ctrl);
nvme_pci_update_nr_queues(dev);
nvme_dbbuf_set(dev);
nvme_unfreeze(&dev->ctrl);
} else {
dev_warn(dev->ctrl.device, "IO queues lost\n");