Re: MSI fix for buggy PCI/PCI-X hardware

[Jeff Garzik]

On Tue, Sep 09, 2003 at 08:39:37AM -0700, long wrote:
> The proposed solution is to provide a new API, named "int 
> disable_msi(struct pci_dev *dev)", to allow IHV's who have 
> shipped PCI/PCI-X hardware that does not work in MSI mode to update 
> their software drivers to request the kernel to switch the 
> interrupt mode from MSI mode back to IRQ pin-assertion mode. 

No need for a new API.  We have drivers/pci/quirk.c where we add PCI
devices with known bugs.  If there is commonality of the bugs across
hardware, we can easily add a common "quirk" which fixes the situation.

Individual drivers shouldn't need to bother with this, really.

As an aside, if you need to blacklist certain _systems_ rather than
certain PCI devices, you should either modify drivers/pci/quirks.c or
arch/i386/kernel/dmi_scan.c.

	Jeff



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