This is a note to let you know that I've just added the patch titled
usb: Skip PCI USB quirk handling for Netlogic XLP
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-skip-pci-usb-quirk-handling-for-netlogic-xlp.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From e4436a7c17ac2b5e138f93f83a541cba9b311685 Mon Sep 17 00:00:00 2001
From: Jayachandran C <[email protected]>
Date: Fri, 27 Jan 2012 20:27:32 +0530
Subject: usb: Skip PCI USB quirk handling for Netlogic XLP
From: Jayachandran C <[email protected]>
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 <[email protected]>
Acked-by: Alan Stern <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
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)
Patches currently in stable-queue which might be from
[email protected] are
queue-3.0/usb-skip-pci-usb-quirk-handling-for-netlogic-xlp.patch
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