Re: [patch] PCI: disable MSI on more ATI NorthBridges

Jeff Garzik
2007-10-23T10:15:27Z

Daniel Barkalow wrote:
> I have a device that supports MSI and INTX-disable, and, with MSI on (and
> delivering interrupts successfully) also sends legacy interrupts (on
> the IRQ that is no longer associated with the device) unless INTX is
> disabled. Without the intx_disable(), the kernel disables the IRQ
> entirely and breaks a random other device in my system.

That sort of behavior is an example of why I wrote pci_intx() in the
first place, and employed it by default throughout the ATA drivers
(before it migrated into PCI core).

Jeff