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usb: Skip PCI USB quirk handling for Netlogic XLP

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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 <[email protected]>
Cc: stable <[email protected]>
Acked-by: Alan Stern <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Jayachandran C 2012-01-27 20:27:32 +05:30 • committed by Greg Kroah-Hartman
commit e4436a7c17
1 changed files with 6 additions and 0 deletions
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6
drivers/usb/host/pci-quirks.c
View file

@ -867,6 +867,12 @@ 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)