linux-kernel - Re: [PATCH v5 10/33] iommu, irq: Allocate irq_desc for dmar

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Date:	Sat, 22 Feb 2014 23:33:23 +0800
From:	Jiang Liu <jiang.liu@...ux.intel.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>, Tony Luck <tony.luck@...el.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Joerg Roedel <joro@...tes.org>,
	Donald Dutile <ddutile@...hat.com>,
	Sebastian Andrzej Siewior <sebastian@...akpoint.cc>,
	"stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: Re: [PATCH v5 10/33] iommu, irq: Allocate irq_desc for dmar_msi with
 local node

Hi Yinghai,
	I have a plan to test this patch set once I have reviewed
all patches in coming weeks. Do you have a plan to update to latest
kernel or is it ok to test this version?
Thanks!
Gerry

On 2014/2/22 15:44, Yinghai Lu wrote:
> On Fri, Feb 21, 2014 at 7:14 PM, Jiang Liu <jiang.liu@...ux.intel.com> wrote:
> 
>>         Seems there is no such protection on IA64 side. I feel create_irq_nr()
>> returns 0 for error is a little risky, 0 may be
>> a valid IRQ number on other platforms(no sure about this).
>> Thanks!
> 
> in [PATCH] ia64, irq: Add dummy create_irq_nr()
> 
> +unsigned int create_irq_nr(unsigned int from, int node)
> +{
> +       int irq = create_irq();
> +
> +       if (irq < 0)
> +               irq = 0;
> +
> +       return irq;
> +}
> +
> 
> so that from is ignored.
> 
> create_irq_nr() is only with x86 and ia64.
> 
> Thanks
> 
> Yinghai
> 
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