[PATCH] nvme: Quirks for PM1725 controllers

Martin K. Petersen martin.petersen at oracle.com
Sat Jul 1 14:31:17 PDT 2017


> PM1725 controllers have a couple of quirks that need to be handled in
> the driver:
>
>  - I/O queue depth must be limited to 64 entries on controllers that do
>    not report MQES.
>
>  - The host interface registers go offline briefly while resetting the
>    chip. Thus a delay is needed before checking whether the controller
>    is ready.
>
> Note that the admin queue depth is also limited to 64 on older versions
> of this board. Since our NVME_AQ_DEPTH is now 32 that is no longer an
> issue.

Discussed this with Keith privately and he prefers the current
non-quirks approach to limiting the queue depth.

Thus no changes needed, please review/apply.

-- 
Martin K. Petersen	Oracle Linux Engineering



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