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Subject[patch 49/55] usb: Skip PCI USB quirk handling for Netlogic XLP
3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jayachandran C <jayachandranc@netlogicmicro.com>

commit e4436a7c17ac2b5e138f93f83a541cba9b311685 upstream.

The Netlogic XLP SoC's on-chip USB controller appears as a PCI
USB device, but does not need the EHCI/OHCI handoff done in
usb/host/pci-quirks.c.

The pci-quirks.c is enabled for all vendors and devices, and is
enabled if USB and PCI are configured.

If we do not skip the qurik handling on XLP, the readb() call in
ehci_bios_handoff() will cause a crash since byte access is not
supported for EHCI registers in XLP.

Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/usb/host/pci-quirks.c | 6 ++++++
1 file changed, 6 insertions(+)

--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -866,6 +866,12 @@ hc_init:

static void __devinit quirk_usb_early_handoff(struct pci_dev *pdev)
{
+ /* Skip Netlogic mips SoC's internal PCI USB controller.
+ * This device does not need/support EHCI/OHCI handoff
+ */
+ if (pdev->vendor == 0x184e) /* vendor Netlogic */
+ return;
+
if (pdev->class == PCI_CLASS_SERIAL_USB_UHCI)
quirk_usb_handoff_uhci(pdev);
else if (pdev->class == PCI_CLASS_SERIAL_USB_OHCI)



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