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SubjectRe: [PATCH v9 4/4] sd: change to auto suspend mode
On Wed, 6 Feb 2013, Aaron Lu wrote:

> > The "if (err == -EAGAIN)" test and the call to pm_schedule_suspend seem
> > to have been dropped since v8 of this series. It looks like they ought
> > to be moved into sdev_runtime_suspend.
>
> I thought they were no longer needed...

You did not mention this in the patch description.

> For sd, we have request based rutime PM and the PM core will always try
> to autosuspend the device with the timer; and for sr, the poll will
> trigger suspend constantly.

What if the poll has been disabled?

> And for both, we don't return -EAGAIN anyway.
> So I suppose that code is not necessary?

You could replace it with WARN_ON(err == -EAGAIN). That way if some
SCSI driver does return -EAGAIN in the future, people will know
something is wrong.

> BTW, I'll be on vocation till 02/17, and I don't have access to the
> internet in my hometown, but please feel free to drop any comments and
> I'll check them when I get back.

I'm going on vacation next week too. Enjoy your trip.

Alan Stern



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