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SubjectRe: [PATCH RFC] scsi: ufs: Disable blk-mq for now
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On 13/09/18 15:05, Ming Lei wrote:
> On Thu, Sep 13, 2018 at 02:28:48PM +0300, Adrian Hunter wrote:
>> blk-mq does not support runtime pm, so disable blk-mq support for now.
>
> So could you describe a bit what the issue you are trying to fix?

UFS is a low-power solution, so we must be able to runtime suspend.

>
> This is host level runtime PM you are trying to address, and if blk-mq
> runtime isn't enabled, I guess the host won't be runtime suspended at all
> because some of its descendant are always active.
>
> So seems we need to do nothing for preventing the host controller from
> entering runtime suspend.

We don't want to prevent the host controller from runtime suspending, quite
the opposite.

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