linux-kernel - RE: [PATCH v3 1/2] ACPI: Add stubs for wakeup handler functions

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Message-ID: <DM6PR12MB44995E8EAFF6A029F3E320AAE2809@DM6PR12MB4499.namprd12.prod.outlook.com>
Date:   Fri, 22 Oct 2021 20:32:10 +0000
From:   "Limonciello, Mario" <Mario.Limonciello@....com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
CC:     Linus Walleij <linus.walleij@...aro.org>,
        "Natikar, Basavaraj" <Basavaraj.Natikar@....com>,
        "S-k, Shyam-sundar" <Shyam-sundar.S-k@....com>,
        "open list:PIN CONTROL SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "Shah, Nehal-bakulchandra" <Nehal-bakulchandra.Shah@....com>,
        Linux ACPI <linux-acpi@...r.kernel.org>
Subject: RE: [PATCH v3 1/2] ACPI: Add stubs for wakeup handler functions

[Public]



> -----Original Message-----
> From: Rafael J. Wysocki <rjw@...ysocki.net>
> Sent: Friday, October 22, 2021 07:54
> To: Limonciello, Mario <Mario.Limonciello@....com>
> Cc: Linus Walleij <linus.walleij@...aro.org>; Natikar, Basavaraj
> <Basavaraj.Natikar@....com>; S-k, Shyam-sundar <Shyam-sundar.S-
> k@....com>; open list:PIN CONTROL SUBSYSTEM <linux-
> gpio@...r.kernel.org>; open list <linux-kernel@...r.kernel.org>; Shah, Nehal-
> bakulchandra <Nehal-bakulchandra.Shah@....com>; Limonciello, Mario
> <Mario.Limonciello@....com>; Linux ACPI <linux-acpi@...r.kernel.org>
> Subject: Re: [PATCH v3 1/2] ACPI: Add stubs for wakeup handler functions
> 
> CC: linux-acpi
> 
> On Tuesday, October 19, 2021 6:04:00 PM CEST Mario Limonciello wrote:
> > commit ddfd9dcf270c ("ACPI: PM: Add acpi_[un]register_wakeup_handler()")
> > added new functions for drivers to use during the s2idle wakeup path, but
> > didn't add stubs for when CONFIG_ACPI wasn't set.
> >
> > Add those stubs in for other drivers to be able to use.
> >
> > Fixes: ddfd9dcf270c ("ACPI: PM: Add acpi_[un]register_wakeup_handler()")
> > Signed-off-by: Mario Limonciello <mario.limonciello@....com>
> > ---
> >  include/linux/acpi.h | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> >
> > diff --git a/include/linux/acpi.h b/include/linux/acpi.h
> > index 72e4f7fd268c..b31bcc0f4c89 100644
> > --- a/include/linux/acpi.h
> > +++ b/include/linux/acpi.h
> > @@ -976,6 +976,14 @@ static inline int acpi_get_local_address(acpi_handle
> handle, u32 *addr)
> >  	return -ENODEV;
> >  }
> >
> > +static inline int acpi_register_wakeup_handler(
> > +	int wake_irq, bool (*wakeup)(void *context), void *context)
> > +{
> > +	return -EINVAL;
> 
> -ENOTSUPP ?
> 

checkpatch reports:

WARNING: ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP

So what to use?

> > +}
> > +static inline void acpi_unregister_wakeup_handler(
> > +	bool (*wakeup)(void *context), void *context) { }
> > +
> >  #endif	/* !CONFIG_ACPI */
> >
> >  #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
> >
> 
> 
>