Re: [linux-usb-devel] [PATCH] proper bios handoff in ehci-hcd

[David Brownell]

Will Beers wrote:
>  > Sounds to me like your BIOS may be broken.  But if you're
>  > up for it, you could try using byte access to write that one
>
> Changing the pci_read_config to a byte access fixes it, thanks!

You're reading byte 0 not byte 2 of that field ... I meant
more like the attached patch to _write_ the flag (untested).


> -                       pci_read_config_dword(pdev, where, &cap);
> +                       pci_read_config_byte(pdev, where, &cap);
--- 1.89/drivers/usb/host/ehci-hcd.c	Wed Jun 30 19:10:04 2004
+++ edited/drivers/usb/host/ehci-hcd.c	Tue Jul 13 14:33:41 2004
@@ -293,8 +293,7 @@
 		struct pci_dev *pdev = to_pci_dev(ehci->hcd.self.controller);
 
 		/* request handoff to OS */
-		cap |= 1 << 24;
-		pci_write_config_dword(pdev, where, cap);
+		pci_write_config_byte(pdev, where + 3, 1);
 
 		/* and wait a while for it to happen */
 		do {