On Wed, Mar 14, 2007 at 06:34:11PM -0400, Jeff Garzik wrote: > Russell King wrote: > >pci_enable_device() doesn't deal with this; in most PCI setups I've > >seen, there is no control at PCI level over whether a device generates > >an interrupt on the bus. Certainly the memory and io command enables > > PCI grew an interrupt enable while you weren't looking: > PCI_COMMAND_INTX_DISABLE That's fine for devices which conform to the later PCI specs, but not all do. > It was added in PCI 2.3 I think. Correct. > Older PCI devices certainly do not have this standardized bit. No PCI device that I have has that bit - including the raid card I bought last year... In any case, relying on such a new control bit to implement this kind of functionality would result in a very hit and miss result; Linux tends to get used on things other than the bleeding edge of hardware technology. -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
