> diff -Nru a/drivers/net/wireless/prism54/islpci_hotplug.c b/drivers/net/wireless/prism54/islpci_hotplug.c
> --- a/drivers/net/wireless/prism54/islpci_hotplug.c	2004-07-01 12:09:09 -07:00
> +++ b/drivers/net/wireless/prism54/islpci_hotplug.c	2004-07-01 12:09:09 -07:00
> @@ -321,6 +321,9 @@
>  	DEBUG(SHOW_TRACING, "%s: pci_set_master(pdev)\n", DRV_NAME);
>  	pci_set_master(pdev);
>  
> +	/* enable MWI */
> +	pci_set_mwi(pdev);
> +

pci_set_mwi() has a return value that you're supposed to check.....