linux-kernel - Re: [PATCH] hid: enable hid device to suspend/resume asynchronously

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Date:	Thu, 24 Sep 2015 14:07:47 +0800
From:	"Fu, Zhonghui" <zhonghui.fu@...ux.intel.com>
To:	Jiri Kosina <jikos@...nel.org>
CC:	linux-input@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] hid: enable hid device to suspend/resume asynchronously

On 2015/9/4 21:10, Jiri Kosina wrote:
> On Mon, 17 Aug 2015, Fu, Zhonghui wrote:
>
>> Enable hid device to suspend/resume asynchronously. This can improve
>> system suspend/resume speed.
> How well was this tested?
>
> Power management is notorious for not being really in excellent shape on 
> many HID devices.
>
> So I'd like to be careful.
I were on leave these days, so sorry for late reply.

This can reduce system suspend/resume time about 20ms, from 1030ms to 1010ms on ASUS T100TA machine. Although the improvement is not very significant, but this can let your parent/child device suspend/resume more asynchronously and take advantage of multicore to improve overall system suspend/resume speed.

I have resent this patch with updated commit message - "[PATCH v2] hid: enable hid device to suspend/resume asynchronously".

Thanks,
Zhonghui

>
> Thanks,
>

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