Re: [PATCH v2 3/4] PCI: Disable ACS SV capability for the broken IDT switches

[Jason Gunthorpe]

On Tue, Dec 02, 2025 at 07:52:50PM +0530, Manivannan Sadhasivam wrote:
> @@ -544,6 +544,7 @@ struct pci_dev {
>  #endif
>  	u16		acs_cap;	/* ACS Capability offset */
>  	u16		acs_capabilities; /* ACS Capabilities */
> +	u16		acs_broken_cap; /* Broken ACS Capabilities */

Why do we need this? Have the quirk function accep tthe
acs_capabilities from the register and return the value to program
into struct pci_dev ?

Jason