linux-kernel - Re: [Bugfix] x86, irq: Fix bug in setting IOAPIC pin attributes

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Message-ID: <53FCD816.6070108@infradead.org>
Date:	Tue, 26 Aug 2014 11:55:18 -0700
From:	Randy Dunlap <rdunlap@...radead.org>
To:	Jiang Liu <jiang.liu@...ux.intel.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Yinghai Lu <yinghai@...nel.org>,
	Borislav Petkov <bp@...en8.de>,
	Grant Likely <grant.likely@...aro.org>, x86@...nel.org,
	Prarit Bhargava <prarit@...hat.com>
CC:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tony Luck <tony.luck@...el.com>,
	Joerg Roedel <joro@...tes.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-acpi@...r.kernel.org, Ingo Molnar <mingo@...nel.org>
Subject: Re: [Bugfix] x86, irq: Fix bug in setting IOAPIC pin attributes

On 08/26/14 01:45, Jiang Liu wrote:
> diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
> index 29290f554e79..66c2700c9f83 100644
> --- a/arch/x86/kernel/apic/io_apic.c
> +++ b/arch/x86/kernel/apic/io_apic.c
> @@ -3896,7 +3896,15 @@ int mp_irqdomain_map(struct irq_domain *domain, unsigned int virq,
> +		/*
> +		 * setup_IO_APIC_irqs() programs all legacy IRQs with default
> +		 * trigger and polarity attirbutes. Don't set the flag for that

		                        attributes.

> +		 * case so the first legacy IRQ user could reprogram the pin
> +		 * with real trigger and polarity attributes.
> +		 */

thanks,
-- 
~Randy
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