linux-kernel - Re: 3.12.x looses serial mouse over hibernate + resume

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Date:	Mon, 02 Dec 2013 12:30:57 -0700
From:	Shuah Khan <shuah.kh@...sung.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Manuel Krause <manuelkrause@...scape.net>,
	Peter Hurley <peter@...leysoftware.com>,
	linux-kernel@...r.kernel.org, Greg KH <gregkh@...uxfoundation.org>,
	linux-input@...r.kernel.org,
	linux-serial <linux-serial@...r.kernel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	"shuahkhan@...il.com" <shuahkhan@...il.com>,
	Shuah Khan <shuah.kh@...sung.com>
Subject: Re: 3.12.x looses serial mouse over hibernate + resume

On 12/02/2013 12:08 PM, Dmitry Torokhov wrote:
> On Mon, Dec 02, 2013 at 11:44:56AM -0700, Shuah Khan wrote:

>>>
>>
>> I am glad the problem is fixed. But I am puzzled. pnp_bus_resume()
>> didn't handle restore prior to this change. state doesn't get passed
>> in to legacy resume routines. I had to add freeze to handle
>> PMSG_FREEZE case, sounds like restore is needed as well, however I
>> don't see where how restore is handled prior to this change.
>
> Take a look at drivers/base/platform.c::platform_pm_restore()
>
> Thanks.
>

Yes I see it now. Before the conversion, platform_legacy_resume() path 
is taken since pnp didn't have pm.

        if (drv->pm) {
                 if (drv->pm->restore)
                         ret = drv->pm->restore(dev);
        } else {
                 ret = platform_legacy_resume(dev);
         }

Thanks for fixing the problem.

-- Shuah

-- 
Shuah Khan
Senior Linux Kernel Developer - Open Source Group
Samsung Research America(Silicon Valley)
shuah.kh@...sung.com | (970) 672-0658
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