On Wed, 29 Jan 2014 13:06, David Cohen wrote:
> On Wed, Jan 29, 2014 at 01:52:30PM -0600, Felipe Balbi wrote:
>> On Wed, Jan 29, 2014 at 11:12:32AM -0800, David Cohen wrote:
>>> On Wed, Jan 29, 2014 at 03:23:40PM +0800, xinhui.pan wrote:
>>>>
>>>> 于 2014年01月29日 08:13, David Cohen 写道:
>>>>> On Tue, Jan 28, 2014 at 12:12:06PM -0600, Felipe Balbi wrote:
>>>>>> On Tue, Jan 28, 2014 at 09:24:13AM -0800, David Cohen wrote:
>>>>>>> On Tue, Jan 28, 2014 at 10:49:37AM -0600, Felipe Balbi wrote:
>>>>>>>> On Tue, Jan 28, 2014 at 04:50:57PM +0800, xinhui.pan wrote:
>>>>>>>>> From: "xinhui.pan" <xinhuix....@intel.com>
>>>>>>>>>
>>>>>>>>> intel_gpio_runtime_idle should return correct error code if it do
>>>>>>>>> fail.
>>>>>>>>> make it more correct even though -EBUSY is the most possible return
>>>>>>>>> value.
>>>>>>>>>
>>>>>>>>> Signed-off-by: bo.he <bo...@intel.com>
>>>>>>>>> Signed-off-by: xinhui.pan <xinhuix....@intel.com>
>>>>>>>>> ---
>>>>>>>>> drivers/gpio/gpio-intel-mid.c | 4 +++-
>>>>>>>>> 1 file changed, 3 insertions(+), 1 deletion(-)
>>>>>>>>>
>>>>>>>>> diff --git a/drivers/gpio/gpio-intel-mid.c
>>>>>>>>> b/drivers/gpio/gpio-intel-mid.c
>>>>>>>>> index d1b50ef..05749a3 100644
>>>>>>>>> --- a/drivers/gpio/gpio-intel-mid.c
>>>>>>>>> +++ b/drivers/gpio/gpio-intel-mid.c
>>>>>>>>> @@ -394,7 +394,9 @@ static const struct irq_domain_ops
>>>>>>>>> intel_gpio_irq_ops = {
>>>>>>>>>
>>>>>>>>> static int intel_gpio_runtime_idle(struct device *dev)
>>>>>>>>> {
>>>>>>>>> - pm_schedule_suspend(dev, 500);
>>>>>>>>> + int err = pm_schedule_suspend(dev, 500);
>>>>>>>>> + if (err)
>>>>>>>>> + return err;
>>>>>>>>> return -EBUSY;
>>>>>>>>
>>>>>>>> wait, is it only me or this would look a lot better as:
>>>>>>>>
>>>>>>>> static int intel_gpio_runtime_idle(struct device *dev)
>>>>>>>> {
>>>>>>>> return pm_schedule_suspend(dev, 500);
>>>>>>>> }
>>>>>>>
>>>>>>> The reply to your suggestion is probably in this commit :)
>>>>>>>
>>>>>>> ---
>>>>>>> commit 45f0a85c8258741d11bda25c0a5669c06267204a
>>>>>>> Author: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
>>>>>>> Date: Mon Jun 3 21:49:52 2013 +0200
>>>>>>>
>>>>>>> PM / Runtime: Rework the "runtime idle" helper routine
>>>>>>> ---
>>>>>>>
>>>>>>> We won't return 0 from here.
>>>>>>
>>>>>> so you never want to return 0, why don't you, then:
>>>>>>
>>>>>> static int intel_gpio_runtime_idle(struct device *dev)
>>>>>> {
>>>>>> pm_schedule_suspend(dev, 500);
>>>>>> return -EBUSY;
>>>>>> }
>>>>>
>>>>> That's how it is currently :)
>>>>>
>>>>> But this patch is making the function to return a different code in case
>>>>> of error. IMHO there is not much fuctional gain with it, but I see
>>>>> perhaps one extra info for tracing during development.
>>>>>
>>>>> Anyway, I'll let Xinhui to do further comment since he's the author.
>>>>>
>>>>> Br, David
>>>>>
>>>> hi ,David & Balbi
>>>> I checked several drivers yesterday to see how they use
>>>> pm_schedule_suspend
>>>> then found one bug in i2c. Also I noticed gpio.
>>>> I think returning a correct error code is important.So I change -EBUSY
>>>> to *err*. To be honest,current code works well.
>>>
>>> In my experience, when I'm using fancy things like lauterbach a proper
>>> error code may save couple of minutes in my life :)
>>>
>>> I keep my ack here.
>>
>> fair enough, sorry for the noise ;-) It could still be simplified a bit:
>>
>> return err ?: -EBUSY;
>
> Agreed :)
> Xinhui, could we have this suggestion in your patch?
>
> Br, David
>
Hi all,
I am xinhui pan. Thanks to the VPN problem, I can't access Intel's network.
So I have to send you this email by personal email address.
I am on Spring Festival vacation until Feb 9th. Sorry for that.
Your suggestion is very nice,thanks :)
I will generate V2 patch ASAP when my vocation is over. Thanks for all your
help.
>>
>> --
>> balbi
>
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