xhci: Fix resume issues on Renesas chips in Samsung laptops

commit 1aa9578c1a9450fb21501c4f549f5b1edb557e6d upstream.

Don Zickus <dzickus@redhat.com> writes:

Some co-workers of mine bought Samsung laptops that had mostly usb3 ports.
Those ports did not resume correctly (the driver would timeout communicating
and fail).  This led to frustration as suspend/resume is a common use for
laptops.

Poking around, I applied the reset on resume quirk to this chipset and the
resume started working.  Reloading the xhci_hcd module had been the temporary
workaround.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Reported-by: Don Zickus <dzickus@redhat.com>
Tested-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 159e3c6d92b9edee23329678e3378c608e4d9f78..3581416a24d8658bf672016e7df9d6b0ab0e418a 100644 (file)
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -113,6 +113,11 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
                xhci_dbg(xhci, "QUIRK: Resetting on resume\n");
                xhci->quirks |= XHCI_TRUST_TX_LENGTH;
        }
+       if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
+                       pdev->device == 0x0015 &&
+                       pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG &&
+                       pdev->subsystem_device == 0xc0cd)
+               xhci->quirks |= XHCI_RESET_ON_RESUME;
        if (pdev->vendor == PCI_VENDOR_ID_VIA)
                xhci->quirks |= XHCI_RESET_ON_RESUME;
 }