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Koen Kooi
2425d6e457
Readahead fixed! Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Denys Dmytriyenko <denys@ti.com>
46 lines
1.6 KiB
Diff
46 lines
1.6 KiB
Diff
From 0bbd5d1b0a768b0b5761643b601422dfe78fd9c5 Mon Sep 17 00:00:00 2001
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From: Jayachandran C <jayachandranc@netlogicmicro.com>
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Date: Fri, 27 Jan 2012 20:27:32 +0530
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Subject: [PATCH 79/87] usb: Skip PCI USB quirk handling for Netlogic XLP
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commit e4436a7c17ac2b5e138f93f83a541cba9b311685 upstream.
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The Netlogic XLP SoC's on-chip USB controller appears as a PCI
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USB device, but does not need the EHCI/OHCI handoff done in
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usb/host/pci-quirks.c.
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The pci-quirks.c is enabled for all vendors and devices, and is
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enabled if USB and PCI are configured.
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If we do not skip the qurik handling on XLP, the readb() call in
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ehci_bios_handoff() will cause a crash since byte access is not
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supported for EHCI registers in XLP.
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Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
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Acked-by: Alan Stern <stern@rowland.harvard.edu>
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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drivers/usb/host/pci-quirks.c | 6 ++++++
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1 files changed, 6 insertions(+), 0 deletions(-)
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diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
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index caf8742..ac53a66 100644
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--- a/drivers/usb/host/pci-quirks.c
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+++ b/drivers/usb/host/pci-quirks.c
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@@ -867,6 +867,12 @@ hc_init:
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static void __devinit quirk_usb_early_handoff(struct pci_dev *pdev)
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{
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+ /* Skip Netlogic mips SoC's internal PCI USB controller.
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+ * This device does not need/support EHCI/OHCI handoff
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+ */
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+ if (pdev->vendor == 0x184e) /* vendor Netlogic */
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+ return;
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+
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if (pdev->class == PCI_CLASS_SERIAL_USB_UHCI)
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quirk_usb_handoff_uhci(pdev);
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else if (pdev->class == PCI_CLASS_SERIAL_USB_OHCI)
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--
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1.7.7.4
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