linux-kernel - Re: [Patch v2]

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Message-ID: <55D6D3FC.60404@linux.intel.com>
Date:	Fri, 21 Aug 2015 15:32:12 +0800
From:	Jiang Liu <jiang.liu@...ux.intel.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
	Nick Meier <nmeier@...rosoft.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org
Cc:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org
Subject: Re: [Patch v2]

Hi all,
	Sorry press send to fast, will resend with proper commit message.
Thanks!
Gerry

On 2015/8/21 15:26, Jiang Liu wrote:
> Hi Nick,
> 	Rafael and Thomas have concerns about the way to solve the
> regression by quirk, so could you please help to test this patch?
> Thanks!
> Gerry
> 
> Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
> ---
>  arch/x86/kernel/acpi/boot.c |    1 +
>  drivers/acpi/pci_link.c     |   16 ++++++++++++++++
>  include/linux/acpi.h        |    2 +-
>  3 files changed, 18 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
> index e49ee24da85e..9393896717d0 100644
> --- a/arch/x86/kernel/acpi/boot.c
> +++ b/arch/x86/kernel/acpi/boot.c
> @@ -445,6 +445,7 @@ static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger,
>  		polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
>  
>  	mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
> +	acpi_penalize_sci_irq(bus_irq, trigger, polarity);
>  
>  	/*
>  	 * stash over-ride to indicate we've been here
> diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
> index cfd7581cc19f..b09ad554430a 100644
> --- a/drivers/acpi/pci_link.c
> +++ b/drivers/acpi/pci_link.c
> @@ -826,6 +826,22 @@ void acpi_penalize_isa_irq(int irq, int active)
>  }
>  
>  /*
> + * Penalize IRQ used by ACPI SCI. If ACPI SCI pin attributes conflict with
> + * PCI IRQ attributes, mark ACPI SCI as ISA_ALWAYS so it won't be use for
> + * PCI IRQs.
> + */
> +void acpi_penalize_sci_irq(int irq, int trigger, int polarity)
> +{
> +	if (irq >= 0 && irq < ARRAY_SIZE(acpi_irq_penalty)) {
> +		if (trigger != ACPI_MADT_TRIGGER_LEVEL ||
> +		    polarity != ACPI_MADT_POLARITY_ACTIVE_LOW)
> +			acpi_irq_penalty[irq] += PIRQ_PENALTY_ISA_ALWAYS;
> +		else
> +			acpi_irq_penalty[irq] += PIRQ_PENALTY_PCI_USING;
> +	}
> +}
> +
> +/*
>   * Over-ride default table to reserve additional IRQs for use by ISA
>   * e.g. acpi_irq_isa=5
>   * Useful for telling ACPI how not to interfere with your ISA sound card.
> diff --git a/include/linux/acpi.h b/include/linux/acpi.h
> index d2445fa9999f..0b2394f61af4 100644
> --- a/include/linux/acpi.h
> +++ b/include/linux/acpi.h
> @@ -221,7 +221,7 @@ struct pci_dev;
>  
>  int acpi_pci_irq_enable (struct pci_dev *dev);
>  void acpi_penalize_isa_irq(int irq, int active);
> -
> +void acpi_penalize_sci_irq(int irq, int trigger, int polarity);
>  void acpi_pci_irq_disable (struct pci_dev *dev);
>  
>  extern int ec_read(u8 addr, u8 *val);
> 
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