On Thu, Mar 01, 2012 at 11:24:02AM -0800, Yinghai Lu wrote:
> | commit cab928ee1f221c9cc48d6615070fefe2e444384a
> | USB: Fix handoff when BIOS disables host PCI device.
>
> mention only need to do disable/enable for xhci controller.
>
> So just remove that for non-xhci controller and restore old behavior for them.
As I said, we do need to do the enable/disable for all USB hosts. Jesse
Barnes confirms that the PCI core doesn't do that for us, so we can't
rely on the BIOS always enabling the PCI device. I don't think we need
this patch, because we should always be doing the enable/disable for all
USB hosts. We just never had a BIOS that caused this bug to be
discovered until the xHCI BIOS for the Intel system in question.
> Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
>
> ---
> drivers/usb/host/pci-quirks.c | 18 ------------------
> 1 file changed, 18 deletions(-)
>
> Index: linux-2.6/drivers/usb/host/pci-quirks.c
> ===================================================================
> --- linux-2.6.orig/drivers/usb/host/pci-quirks.c
> +++ linux-2.6/drivers/usb/host/pci-quirks.c
> @@ -889,13 +889,7 @@ static void __devinit quirk_usb_early_ha
> if (pdev->vendor == 0x184e) /* vendor Netlogic */
> return;
>
> - if (pci_enable_device(pdev) < 0) {
> - dev_warn(&pdev->dev, "Can't enable PCI device, "
> - "BIOS handoff failed.\n");
> - return;
> - }
> quirk_usb_handoff_uhci(pdev);
> - pci_disable_device(pdev);
> }
> DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID,
> PCI_CLASS_SERIAL_USB_UHCI, 0, quirk_usb_early_handoff_uhci);
> @@ -908,13 +902,7 @@ static void __devinit quirk_usb_early_ha
> if (pdev->vendor == 0x184e) /* vendor Netlogic */
> return;
>
> - if (pci_enable_device(pdev) < 0) {
> - dev_warn(&pdev->dev, "Can't enable PCI device, "
> - "BIOS handoff failed.\n");
> - return;
> - }
> quirk_usb_handoff_ohci(pdev);
> - pci_disable_device(pdev);
> }
> DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID,
> PCI_CLASS_SERIAL_USB_OHCI, 0, quirk_usb_early_handoff_ohci);
> @@ -924,13 +912,7 @@ static void __devinit quirk_usb_early_ha
> if (pdev->vendor == 0x184e) /* vendor Netlogic */
> return;
>
> - if (pci_enable_device(pdev) < 0) {
> - dev_warn(&pdev->dev, "Can't enable PCI device, "
> - "BIOS handoff failed.\n");
> - return;
> - }
> quirk_usb_handoff_ehci(pdev);
> - pci_disable_device(pdev);
> }
> DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID,
> PCI_CLASS_SERIAL_USB_EHCI, 0, quirk_usb_early_handoff_ehci);
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