linux-kernel - Re: [PATCH 14/16] amd_iommu: clean up unnecessary MSI/MSI-X capability find

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Date:	Wed, 14 Aug 2013 12:20:09 +0200
From:	Joerg Roedel <joro@...tes.org>
To:	Yijing Wang <wangyijing@...wei.com>
Cc:	Hanjun Guo <guohanjun@...wei.com>, jiang.liu@...wei.com,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 14/16] amd_iommu: clean up unnecessary MSI/MSI-X
 capability find

On Thu, Aug 08, 2013 at 09:12:36PM +0800, Yijing Wang wrote:
> PCI core will initialize device MSI/MSI-X capability in
> pci_msi_init_pci_dev(). So device driver should use
> pci_dev->msi_cap/msix_cap to determine whether the device
> support MSI/MSI-X instead of using
> pci_find_capability(pci_dev, PCI_CAP_ID_MSI/MSIX).
> Access to PCIe device config space again will consume more time.
> 
> Signed-off-by: Yijing Wang <wangyijing@...wei.com>
> Cc: Joerg Roedel <joro@...tes.org>
> Cc: iommu@...ts.linux-foundation.org
> Cc: linux-kernel@...r.kernel.org

Applied to x86/amd, thanks.


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