Subject: Re: [PATCH v3 12/13] PCI/ATS: Add PASID stubs

From: Bjorn Helgaas <[email-masked]>
Date: Tue, 10 Dec 2019 15:07:41 -0600

On Mon, Dec 09, 2019 at 07:05:13PM +0100, Jean-Philippe Brucker wrote:
> The SMMUv3 driver, which may be built without CONFIG_PCI, will soon gain
> PASID support.  Partially revert commit c6e9aefbf9db ("PCI/ATS: Remove
> unused PRI and PASID stubs") to re-introduce the PASID stubs, and avoid
> adding more #ifdefs to the SMMU driver.
> 
> Signed-off-by: Jean-Philippe Brucker <[email-masked]>

Acked-by: Bjorn Helgaas <[email-masked]>

> ---
>  include/linux/pci-ats.h | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/include/linux/pci-ats.h b/include/linux/pci-ats.h
> index 5d62e78946a3..d08f0869f121 100644
> --- a/include/linux/pci-ats.h
> +++ b/include/linux/pci-ats.h
> @@ -33,6 +33,9 @@ void pci_disable_pasid(struct pci_dev *pdev);
>  int pci_pasid_features(struct pci_dev *pdev);
>  int pci_max_pasids(struct pci_dev *pdev);
>  #else /* CONFIG_PCI_PASID */
> +static inline int pci_enable_pasid(struct pci_dev *pdev, int features)
> +{ return -EINVAL; }
> +static inline void pci_disable_pasid(struct pci_dev *pdev) { }
>  static inline int pci_pasid_features(struct pci_dev *pdev)
>  { return -EINVAL; }
>  static inline int pci_max_pasids(struct pci_dev *pdev)
> -- 
> 2.24.0
> 

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