Re: [Xen-devel] [PATCH v2 03/22] MSI: Remove the redundant irq_set_chip_data()

[Thierry Reding <thierry.reding@xxxxxxxxx>]

On Thu, Sep 25, 2014 at 11:14:13AM +0800, Yijing Wang wrote:
> Currently, pcie-designware, pcie-rcar, pci-tegra drivers
> use irq chip_data to save the msi_chip pointer. They
> already call irq_set_chip_data() in their own MSI irq map
> functions. So irq_set_chip_data() in arch_setup_msi_irq()
> is useless.
> 
> Signed-off-by: Yijing Wang <wangyijing@xxxxxxxxxx>
> ---
>  drivers/pci/msi.c |    5 ++---
>  1 files changed, 2 insertions(+), 3 deletions(-)

Reviewed-by: Thierry Reding <treding@xxxxxxxxxx>

> 
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index 51d7e62..50f67a3 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -41,14 +41,13 @@ int __weak arch_setup_msi_irq(struct pci_dev *dev, struct 
> msi_desc *desc)
>       if (err < 0)
>               return err;
>  
> -     irq_set_chip_data(desc->irq, chip);
> -
>       return 0;
>  }
>  
>  void __weak arch_teardown_msi_irq(unsigned int irq)
>  {
> -     struct msi_chip *chip = irq_get_chip_data(irq);
> +     struct msi_desc *entry = irq_get_msi_desc(irq);
> +     struct msi_chip *chip = entry->dev->bus->msi;
>  
>       if (!chip || !chip->teardown_irq)
>               return;
> -- 
> 1.7.1
>

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