[PATCH 5/5] nvme: Add two-pass shutdown support.

[Jeremy Allison]

On Thu, Jan 04, 2024 at 03:14:16PM +0200, Sagi Grimberg wrote:
>
>On 1/3/24 23:04, Jeremy Allison wrote:
>>This works with the two-pass shutdown mechanism setup for the PCI
>>drivers and participates to provide the shutdown_wait
>>method at the pci_driver structure level.
>>
>>Adds the new NVME_DISABLE_SHUTDOWN_ASYNC to enum shutdown_type.
>>Changes the nvme shutdown() method to set the
>>NVME_CC_SHN_NORMAL bit and then return to the caller when
>>requested by NVME_DISABLE_SHUTDOWN_ASYNC.
>>
>>nvme_shutdown_wait() is added to synchronously wait for
>>the NVME_CSTS_SHST_CMPLT bit.
>>
>>This change speeds up the shutdown in a system which hosts
>>many controllers.
>
>I think that patch 4 can be folded in here.

OK, I thought it was cleaner to have the export as a
separate patch to make it easier to review, but as
you wish.