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

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Date:	Wed, 04 Dec 2013 21:33:00 +0100
From:	Manuel Krause <manuelkrause@...scape.net>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	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>,
	Shuah Khan <shuah.kh@...sung.com>
Subject: Re: 3.12.x looses serial mouse over hibernate + resume

On 2013-12-04 18:16, Dmitry Torokhov wrote:
> On Mon, Dec 02, 2013 at 09:40:20PM +0100, Manuel Krause wrote:
>> On 2013-12-02 20:07, Dmitry Torokhov wrote:
>>>
>>> Thank you Manuel, but IO think the patch is not complete as we need to
>>> re-enable PNP devices after we make a snapshot to make sure they are
>>> working and can handle saving the data. Coudl you please try the patch
>>> below?
>>>
>>
>> PNP: fix restoring devices after hibernation
>>
>> From: Dmitry Torokhov <dmitry.torokhov@...il.com>
>>
>> On returning from hibernation 'restore; callback is called, not
>> 'resume'.
>> This fixes breakage introduced by commit
>> eaf140b60ec961252083ab8adaf67aef29a362dd
>>
>> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
>> ---
>>   drivers/pnp/driver.c |   12 +++++++++++-
>>   1 file changed, 11 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
>> index a39ee38..2bd5c5f 100644
>> --- a/drivers/pnp/driver.c
>> +++ b/drivers/pnp/driver.c
>> @@ -197,6 +197,11 @@ static int pnp_bus_freeze(struct device *dev)
>>   	return __pnp_bus_suspend(dev, PMSG_FREEZE);
>>   }
>>
>> +static int pnp_bus_poweroff(struct device *dev)
>> +{
>> +	return __pnp_bus_suspend(dev, PMSG_HIBERNATE);
>> +}
>> +
>>   static int pnp_bus_resume(struct device *dev)
>>   {
>>   	struct pnp_dev *pnp_dev = to_pnp_dev(dev);
>> @@ -234,9 +239,14 @@ static int pnp_bus_resume(struct device *dev)
>>   }
>>
>>   static const struct dev_pm_ops pnp_bus_dev_pm_ops = {
>> +	/* Suspend callbacks */
>>   	.suspend = pnp_bus_suspend,
>> -	.freeze = pnp_bus_freeze,
>>   	.resume = pnp_bus_resume,
>> +	/* Hibernate callbacks */
>> +	.freeze = pnp_bus_freeze,
>> +	.thaw = pnp_bus_resume,
>> +	.poweroff = pnp_bus_poweroff,
>> +	.restore = pnp_bus_resume,
>>   };
>>
>>   struct bus_type pnp_bus_type = {
>>
>> ALSO, YES, this second patch version does cure the issue, on here,
>> too.
>
> Rafael,
>
> Will you please take this patch in? It would also make sense to add it
> to stable I think.
>
> Thanks.
>

This patch works very well for many following hibernate/resume 
cyles, now, since the patch is applied. And it doesn't show any 
side-effects for me.
Thank you for "taking it in".

Best regards, Manuel Krause

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