linux-kernel - Re: [PATCH] pci: dmar/intr_remapping/iov use physfn to search drhd

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Message-ID: <20090810093022.710a09f8@jbarnes-g45>
Date:	Mon, 10 Aug 2009 09:30:22 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-pci@...r.kernel.org, Yu Zhao <yu.zhao@...el.com>,
	David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH] pci: dmar/intr_remapping/iov use physfn to search drhd

For Dave.

On Tue, 04 Aug 2009 08:57:11 -0700
Yinghai Lu <yinghai@...nel.org> wrote:

> 
> when virtfn is used, we should use physfn to find correct drhd
> 
> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
> 
> ---
>  drivers/pci/dmar.c           |    5 +++++
>  2 files changed, 12 insertions(+), 1 deletion(-)
> 
> Index: linux-2.6/drivers/pci/dmar.c
> ===================================================================
> --- linux-2.6.orig/drivers/pci/dmar.c
> +++ linux-2.6/drivers/pci/dmar.c
> @@ -493,6 +493,11 @@ dmar_find_matched_drhd_unit(struct pci_d
>  	struct dmar_drhd_unit *dmaru = NULL;
>  	struct acpi_dmar_hardware_unit *drhd;
>  
> +#ifdef CONFIG_PCI_IOV
> +	if (dev->is_virtfn)
> +		dev = dev->physfn;
> +#endif
> +
>  	list_for_each_entry(dmaru, &dmar_drhd_units, list) {
>  		drhd = container_of(dmaru->hdr,
>  				    struct acpi_dmar_hardware_unit,
> 


-- 
Jesse Barnes, Intel Open Source Technology Center
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