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Don Zickus <dzickus@redhat.com> writes:
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Some co-workers of mine bought Samsung laptops that had mostly usb3 ports.
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Those ports did not resume correctly (the driver would timeout communicating
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and fail). This led to frustration as suspend/resume is a common use for
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laptops.
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Poking around, I applied the reset on resume quirk to this chipset and the
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resume started working. Reloading the xhci_hcd module had been the temporary
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workaround.
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Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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Reported-by: Don Zickus <dzickus@redhat.com>
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Cc: stable # 2.6.37
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---
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Don, please ask your co-worker to apply this patch and test. Let me
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know if your other co-worker has a different subsystem device ID in his
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Samsung laptop, when he gets back from vacation. If so, we'll extend it
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to all Samsung laptops with that particular Renesas host.
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Sarah Sharp
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drivers/usb/host/xhci-pci.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
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index e42c318a4404..6c03584ac15f 100644
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--- a/drivers/usb/host/xhci-pci.c
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+++ b/drivers/usb/host/xhci-pci.c
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@@ -142,6 +142,11 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
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"QUIRK: Resetting on resume");
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xhci->quirks |= XHCI_TRUST_TX_LENGTH;
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}
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+ if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
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+ pdev->device == 0x0015 &&
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+ pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG &&
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+ pdev->subsystem_device == 0xc0cd)
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+ xhci->quirks |= XHCI_RESET_ON_RESUME;
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if (pdev->vendor == PCI_VENDOR_ID_VIA)
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xhci->quirks |= XHCI_RESET_ON_RESUME;
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}
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--
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1.8.5.2
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--
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