Re: [PATCH linux-next] arm64: PCI: Introduce pcibios_free_irq() helper function

[Will Deacon]

[+Lorenzo]

On Wed, Aug 25, 2021 at 03:16:12PM +0800, Yajun Deng wrote:
> Introduce pcibios_free_irq() to free irq in pci_device_probe() and
> pci_device_remove() that in drivers/pci/pci-driver.c.

Please can you describe the problem you're solving?

> Signed-off-by: Yajun Deng <yajun.deng@xxxxxxxxx>
> ---
>  arch/arm64/kernel/pci.c | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
> index 1006ed2d7c60..40da5aff4548 100644
> --- a/arch/arm64/kernel/pci.c
> +++ b/arch/arm64/kernel/pci.c
> @@ -25,10 +25,18 @@
>  int pcibios_alloc_irq(struct pci_dev *dev)
>  {
>  	if (!acpi_disabled)
> -		acpi_pci_irq_enable(dev);
> +		return acpi_pci_irq_enable(dev);

This means we'll now fail device probe if we can't enable the GSI. Is that a
problem?

Will