[PATCH] genirq: provide dummy set_irq_wake()

[PATCH] genirq: provide dummy set_irq_wake()

[Roger Quadros]

Without this system suspend is broken on systems that have
drivers calling enable/disable_irq_wake() for interrupts based off
the dummy irq hook.
(e.g. drivers/gpio/gpio-pcf857x.c)

http://article.gmane.org/gmane.linux.kernel/1879035

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
 kernel/irq/dummychip.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
index 988dc58..2405d7a 100644
--- a/kernel/irq/dummychip.c
+++ b/kernel/irq/dummychip.c
@@ -32,6 +32,11 @@ static unsigned int noop_ret(struct irq_data *data)
 	return 0;
 }
 
+static int noop_int_ret(struct irq_data *data, unsigned int val)
+{
+	return 0;
+}
+
 /*
  * Generic no controller implementation
  */
@@ -57,5 +62,6 @@ struct irq_chip dummy_irq_chip = {
 	.irq_ack	= noop,
 	.irq_mask	= noop,
 	.irq_unmask	= noop,
+	.irq_set_wake	= noop_int_ret,
 };
 EXPORT_SYMBOL_GPL(dummy_irq_chip);
-- 
2.1.0

Re: [PATCH] genirq: provide dummy set_irq_wake()

[Felipe Balbi]

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On Mon, Mar 30, 2015 at 04:15:45PM +0300, Roger Quadros wrote:
> Without this system suspend is broken on systems that have
> drivers calling enable/disable_irq_wake() for interrupts based off
> the dummy irq hook.
> (e.g. drivers/gpio/gpio-pcf857x.c)
> 
> http://article.gmane.org/gmane.linux.kernel/1879035
> 
> Signed-off-by: Roger Quadros <rogerq@ti.com>
> ---
>  kernel/irq/dummychip.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
> index 988dc58..2405d7a 100644
> --- a/kernel/irq/dummychip.c
> +++ b/kernel/irq/dummychip.c
> @@ -32,6 +32,11 @@ static unsigned int noop_ret(struct irq_data *data)
>  	return 0;
>  }
>  
> +static int noop_int_ret(struct irq_data *data, unsigned int val)
> +{
> +	return 0;
> +}
> +

isn't this the same as noop_ret ?

-- 
balbi

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Re: [PATCH] genirq: provide dummy set_irq_wake()

[Felipe Balbi]

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On Mon, Mar 30, 2015 at 01:06:24PM -0500, Felipe Balbi wrote:
> On Mon, Mar 30, 2015 at 04:15:45PM +0300, Roger Quadros wrote:
> > Without this system suspend is broken on systems that have
> > drivers calling enable/disable_irq_wake() for interrupts based off
> > the dummy irq hook.
> > (e.g. drivers/gpio/gpio-pcf857x.c)
> > 
> > http://article.gmane.org/gmane.linux.kernel/1879035
> > 
> > Signed-off-by: Roger Quadros <rogerq@ti.com>
> > ---
> >  kernel/irq/dummychip.c | 6 ++++++
> >  1 file changed, 6 insertions(+)
> > 
> > diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
> > index 988dc58..2405d7a 100644
> > --- a/kernel/irq/dummychip.c
> > +++ b/kernel/irq/dummychip.c
> > @@ -32,6 +32,11 @@ static unsigned int noop_ret(struct irq_data *data)
> >  	return 0;
> >  }
> >  
> > +static int noop_int_ret(struct irq_data *data, unsigned int val)
> > +{
> > +	return 0;
> > +}
> > +
> 
> isn't this the same as noop_ret ?

oh no, unsigned versus signed.

-- 
balbi

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Re: [PATCH] genirq: provide dummy set_irq_wake()

[Roger Quadros]

Hi Thomas,

On 30/03/15 16:15, Roger Quadros wrote:
> Without this system suspend is broken on systems that have
> drivers calling enable/disable_irq_wake() for interrupts based off
> the dummy irq hook.
> (e.g. drivers/gpio/gpio-pcf857x.c)
> 
> http://article.gmane.org/gmane.linux.kernel/1879035
> 
> Signed-off-by: Roger Quadros <rogerq@ti.com>

Any comments on this patch?

cheers,
-roger

> ---
>  kernel/irq/dummychip.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
> index 988dc58..2405d7a 100644
> --- a/kernel/irq/dummychip.c
> +++ b/kernel/irq/dummychip.c
> @@ -32,6 +32,11 @@ static unsigned int noop_ret(struct irq_data *data)
>  	return 0;
>  }
>  
> +static int noop_int_ret(struct irq_data *data, unsigned int val)
> +{
> +	return 0;
> +}
> +
>  /*
>   * Generic no controller implementation
>   */
> @@ -57,5 +62,6 @@ struct irq_chip dummy_irq_chip = {
>  	.irq_ack	= noop,
>  	.irq_mask	= noop,
>  	.irq_unmask	= noop,
> +	.irq_set_wake	= noop_int_ret,
>  };
>  EXPORT_SYMBOL_GPL(dummy_irq_chip);
> 

Re: [PATCH] genirq: provide dummy set_irq_wake()

[Gregory CLEMENT]

Hi Roger,

On 14/04/2015 12:13, Roger Quadros wrote:
> Hi Thomas,
> 
> On 30/03/15 16:15, Roger Quadros wrote:
>> Without this system suspend is broken on systems that have
>> drivers calling enable/disable_irq_wake() for interrupts based off
>> the dummy irq hook.
>> (e.g. drivers/gpio/gpio-pcf857x.c)
>>
>> http://article.gmane.org/gmane.linux.kernel/1879035
>>
>> Signed-off-by: Roger Quadros <rogerq@ti.com>
> 
> Any comments on this patch?

I read the url you pointed and I wonder why, at then end, did
you choose to add a dummy set_irq_wake() instead of using
IRQCHIP_SKIP_SET_WAKE ?

Thanks,

Gregory


> 
> cheers,
> -roger
> 
>> ---
>>  kernel/irq/dummychip.c | 6 ++++++
>>  1 file changed, 6 insertions(+)
>>
>> diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
>> index 988dc58..2405d7a 100644
>> --- a/kernel/irq/dummychip.c
>> +++ b/kernel/irq/dummychip.c
>> @@ -32,6 +32,11 @@ static unsigned int noop_ret(struct irq_data *data)
>>  	return 0;
>>  }
>>  
>> +static int noop_int_ret(struct irq_data *data, unsigned int val)
>> +{
>> +	return 0;
>> +}
>> +
>>  /*
>>   * Generic no controller implementation
>>   */
>> @@ -57,5 +62,6 @@ struct irq_chip dummy_irq_chip = {
>>  	.irq_ack	= noop,
>>  	.irq_mask	= noop,
>>  	.irq_unmask	= noop,
>> +	.irq_set_wake	= noop_int_ret,
>>  };
>>  EXPORT_SYMBOL_GPL(dummy_irq_chip);
>>
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-usb" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 


-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

Re: [PATCH] genirq: provide dummy set_irq_wake()

[Roger Quadros]

Hi Gregory,

On 14/04/15 17:02, Gregory CLEMENT wrote:
> Hi Roger,
> 
> On 14/04/2015 12:13, Roger Quadros wrote:
>> Hi Thomas,
>>
>> On 30/03/15 16:15, Roger Quadros wrote:
>>> Without this system suspend is broken on systems that have
>>> drivers calling enable/disable_irq_wake() for interrupts based off
>>> the dummy irq hook.
>>> (e.g. drivers/gpio/gpio-pcf857x.c)
>>>
>>> http://article.gmane.org/gmane.linux.kernel/1879035
>>>
>>> Signed-off-by: Roger Quadros <rogerq@ti.com>
>>
>> Any comments on this patch?
> 
> I read the url you pointed and I wonder why, at then end, did
> you choose to add a dummy set_irq_wake() instead of using
> IRQCHIP_SKIP_SET_WAKE ?

You mean like this?

diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
index 988dc58..2feb6fe 100644
--- a/kernel/irq/dummychip.c
+++ b/kernel/irq/dummychip.c
@@ -57,5 +57,6 @@ struct irq_chip dummy_irq_chip = {
 	.irq_ack	= noop,
 	.irq_mask	= noop,
 	.irq_unmask	= noop,
+	.flags		= IRQCHIP_SKIP_SET_WAKE,
 };
 EXPORT_SYMBOL_GPL(dummy_irq_chip);

This works as well and is better. I'll post a v2.

cheers,
-roger

>>
>>> ---
>>>  kernel/irq/dummychip.c | 6 ++++++
>>>  1 file changed, 6 insertions(+)
>>>
>>> diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
>>> index 988dc58..2405d7a 100644
>>> --- a/kernel/irq/dummychip.c
>>> +++ b/kernel/irq/dummychip.c
>>> @@ -32,6 +32,11 @@ static unsigned int noop_ret(struct irq_data *data)
>>>  	return 0;
>>>  }
>>>  
>>> +static int noop_int_ret(struct irq_data *data, unsigned int val)
>>> +{
>>> +	return 0;
>>> +}
>>> +
>>>  /*
>>>   * Generic no controller implementation
>>>   */
>>> @@ -57,5 +62,6 @@ struct irq_chip dummy_irq_chip = {
>>>  	.irq_ack	= noop,
>>>  	.irq_mask	= noop,
>>>  	.irq_unmask	= noop,
>>> +	.irq_set_wake	= noop_int_ret,
>>>  };
>>>  EXPORT_SYMBOL_GPL(dummy_irq_chip);
>>>
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-usb" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>
> 
> 

Re: [PATCH] genirq: provide dummy set_irq_wake()

[Gregory CLEMENT]

Hi Roger,

On 15/04/2015 10:07, Roger Quadros wrote:
> Hi Gregory,
> 
> On 14/04/15 17:02, Gregory CLEMENT wrote:
>> Hi Roger,
>>
>> On 14/04/2015 12:13, Roger Quadros wrote:
>>> Hi Thomas,
>>>
>>> On 30/03/15 16:15, Roger Quadros wrote:
>>>> Without this system suspend is broken on systems that have
>>>> drivers calling enable/disable_irq_wake() for interrupts based off
>>>> the dummy irq hook.
>>>> (e.g. drivers/gpio/gpio-pcf857x.c)
>>>>
>>>> http://article.gmane.org/gmane.linux.kernel/1879035
>>>>
>>>> Signed-off-by: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>
>>>
>>> Any comments on this patch?
>>
>> I read the url you pointed and I wonder why, at then end, did
>> you choose to add a dummy set_irq_wake() instead of using
>> IRQCHIP_SKIP_SET_WAKE ?
> 
> You mean like this?
> 
> diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
> index 988dc58..2feb6fe 100644
> --- a/kernel/irq/dummychip.c
> +++ b/kernel/irq/dummychip.c
> @@ -57,5 +57,6 @@ struct irq_chip dummy_irq_chip = {
>  	.irq_ack	= noop,
>  	.irq_mask	= noop,
>  	.irq_unmask	= noop,
> +	.flags		= IRQCHIP_SKIP_SET_WAKE,
>  };
>  EXPORT_SYMBOL_GPL(dummy_irq_chip);


Yes exactly.

> 
> This works as well and is better. I'll post a v2.


Thanks,

Gregory

> 
> cheers,
> -roger
> 
>>>
>>>> ---
>>>>  kernel/irq/dummychip.c | 6 ++++++
>>>>  1 file changed, 6 insertions(+)
>>>>
>>>> diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
>>>> index 988dc58..2405d7a 100644
>>>> --- a/kernel/irq/dummychip.c
>>>> +++ b/kernel/irq/dummychip.c
>>>> @@ -32,6 +32,11 @@ static unsigned int noop_ret(struct irq_data *data)
>>>>  	return 0;
>>>>  }
>>>>  
>>>> +static int noop_int_ret(struct irq_data *data, unsigned int val)
>>>> +{
>>>> +	return 0;
>>>> +}
>>>> +
>>>>  /*
>>>>   * Generic no controller implementation
>>>>   */
>>>> @@ -57,5 +62,6 @@ struct irq_chip dummy_irq_chip = {
>>>>  	.irq_ack	= noop,
>>>>  	.irq_mask	= noop,
>>>>  	.irq_unmask	= noop,
>>>> +	.irq_set_wake	= noop_int_ret,
>>>>  };
>>>>  EXPORT_SYMBOL_GPL(dummy_irq_chip);
>>>>
>>>
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe linux-usb" in
>>> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>
>>
>>
> 


-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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[PATCH v2] genirq: Set IRQCHIP_SKIP_SET_WAKE flag for dummy_irq_chip

[Roger Quadros]

Without this system suspend is broken on systems that have
drivers calling enable/disable_irq_wake() for interrupts based off
the dummy irq hook.
(e.g. drivers/gpio/gpio-pcf857x.c)

http://article.gmane.org/gmane.linux.kernel/1879035

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
 kernel/irq/dummychip.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
index 988dc58..2feb6fe 100644
--- a/kernel/irq/dummychip.c
+++ b/kernel/irq/dummychip.c
@@ -57,5 +57,6 @@ struct irq_chip dummy_irq_chip = {
 	.irq_ack	= noop,
 	.irq_mask	= noop,
 	.irq_unmask	= noop,
+	.flags		= IRQCHIP_SKIP_SET_WAKE,
 };
 EXPORT_SYMBOL_GPL(dummy_irq_chip);
-- 
2.1.0

Re: [PATCH v2] genirq: Set IRQCHIP_SKIP_SET_WAKE flag for dummy_irq_chip

[Gregory CLEMENT]

On 15/04/2015 10:14, Roger Quadros wrote:
> Without this system suspend is broken on systems that have
> drivers calling enable/disable_irq_wake() for interrupts based off
> the dummy irq hook.
> (e.g. drivers/gpio/gpio-pcf857x.c)
> 
> http://article.gmane.org/gmane.linux.kernel/1879035
> 
> Signed-off-by: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>

FWIW:

Reviewed-by: Gregory CLEMENT <gregory.clement-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>


> ---
>  kernel/irq/dummychip.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
> index 988dc58..2feb6fe 100644
> --- a/kernel/irq/dummychip.c
> +++ b/kernel/irq/dummychip.c
> @@ -57,5 +57,6 @@ struct irq_chip dummy_irq_chip = {
>  	.irq_ack	= noop,
>  	.irq_mask	= noop,
>  	.irq_unmask	= noop,
> +	.flags		= IRQCHIP_SKIP_SET_WAKE,
>  };
>  EXPORT_SYMBOL_GPL(dummy_irq_chip);
> 


-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
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Re: [PATCH v2] genirq: Set IRQCHIP_SKIP_SET_WAKE flag for dummy_irq_chip

[Geert Uytterhoeven]

On Wed, Apr 15, 2015 at 10:14 AM, Roger Quadros <rogerq@ti.com> wrote:
> Without this system suspend is broken on systems that have
> drivers calling enable/disable_irq_wake() for interrupts based off
> the dummy irq hook.

Good to see this was applied. Still, I think no_irq_chip should also be
fixed, cfr. my patch "genirq: Set IRQCHIP_SKIP_SET_WAKE for no_irq_chip and
dummy_irq_chip" (https://lkml.org/lkml/2015/1/12/506 is down, but
https://patchwork.ozlabs.org/patch/427788/ works)

> (e.g. drivers/gpio/gpio-pcf857x.c)

Please note the particular pfc857x.c case was fixed by commit b80eef95beb04760
("gpio: pcf857x: Propagate wake-up setting to parent irq controller"), as that
driver has other problems. Now it no longer uses dummy_irq_chip.

> http://article.gmane.org/gmane.linux.kernel/1879035
>
> Signed-off-by: Roger Quadros <rogerq@ti.com>
> ---
>  kernel/irq/dummychip.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
> index 988dc58..2feb6fe 100644
> --- a/kernel/irq/dummychip.c
> +++ b/kernel/irq/dummychip.c
> @@ -57,5 +57,6 @@ struct irq_chip dummy_irq_chip = {
>         .irq_ack        = noop,
>         .irq_mask       = noop,
>         .irq_unmask     = noop,
> +       .flags          = IRQCHIP_SKIP_SET_WAKE,
>  };
>  EXPORT_SYMBOL_GPL(dummy_irq_chip);
> --
> 2.1.0


Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH v2] genirq: Set IRQCHIP_SKIP_SET_WAKE flag for dummy_irq_chip

[Roger Quadros]

Hi Geert,

On 11/05/15 13:50, Geert Uytterhoeven wrote:
> On Wed, Apr 15, 2015 at 10:14 AM, Roger Quadros <rogerq@ti.com> wrote:
>> Without this system suspend is broken on systems that have
>> drivers calling enable/disable_irq_wake() for interrupts based off
>> the dummy irq hook.
>
> Good to see this was applied. Still, I think no_irq_chip should also be
> fixed, cfr. my patch "genirq: Set IRQCHIP_SKIP_SET_WAKE for no_irq_chip and

I don't see why not so can you please send a patch to add that? Thanks.

cheers,
-roger

> dummy_irq_chip" (https://lkml.org/lkml/2015/1/12/506 is down, but
> https://patchwork.ozlabs.org/patch/427788/ works)
>
>> (e.g. drivers/gpio/gpio-pcf857x.c)
>
> Please note the particular pfc857x.c case was fixed by commit b80eef95beb04760
> ("gpio: pcf857x: Propagate wake-up setting to parent irq controller"), as that
> driver has other problems. Now it no longer uses dummy_irq_chip.
>
>> http://article.gmane.org/gmane.linux.kernel/1879035
>>
>> Signed-off-by: Roger Quadros <rogerq@ti.com>
>> ---
>>   kernel/irq/dummychip.c | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
>> index 988dc58..2feb6fe 100644
>> --- a/kernel/irq/dummychip.c
>> +++ b/kernel/irq/dummychip.c
>> @@ -57,5 +57,6 @@ struct irq_chip dummy_irq_chip = {
>>          .irq_ack        = noop,
>>          .irq_mask       = noop,
>>          .irq_unmask     = noop,
>> +       .flags          = IRQCHIP_SKIP_SET_WAKE,
>>   };
>>   EXPORT_SYMBOL_GPL(dummy_irq_chip);
>> --
>> 2.1.0
>
>
> Gr{oetje,eeting}s,
>
>                          Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                  -- Linus Torvalds
>