[PATCH] nvme: enable retries for authentication commands

[Jens Axboe]

On 1/25/24 9:20 AM, Hannes Reinecke wrote:
> On 1/25/24 16:48, Christoph Hellwig wrote:
>> On Thu, Jan 25, 2024 at 08:42:10AM -0700, Jens Axboe wrote:
>>> On 1/25/24 6:09 AM, hare at kernel.org wrote:
>>>> From: Hannes Reinecke <hare at suse.de>
>>>>
>>>> Authentication commands are normal NVMe commands, and as such
>>>> can return a status where NVME_SC_DNR is not set, indicating
>>>> that the command should be retried.
>>>> Rather than checking NVME_SC_DNR manually for each command completion
>>>> this patch adds a flag 'retry' to __nvme_submit_sync_cmd(), causing
>>>> the REQ_FAILFAST_DRIVER option to be cleared and the command to
>>>> be retried via the normal mechanism.
>>>
>>> Can we please do this without adding Yet Another parameter to that
>>> function?
>>
>> Heh, I wrote about the same reply a few minutes ago.  I'll try to think
>> what we can do instead.
> 
> We could do something like this:

That won't really do much, and yeah wouldn't be the way even if
complete. How about just not setting the flag in the first place?
nvme_init_request() defaults to doing it, so either pass in the init
flags to that, or just clear it in there and have the callers decide if
they want to set it.

-- 
Jens Axboe