From: Andiry Xu <andiry.xu@xxxxxxx>
Julian Sikorski reports NEC uPD720200 does not work stable after suspend
and resume. Re-initialize the host in xhci_resume().
This should be backported to stable kernels as old as 2.6.37. The
kernel will need to include
commit c877b3b2ad5cb9d4fe523c5496185cc328ff3ae9
"xhci: Add reset on resume quirk for asrock p67 host"
for this patch to work.
Signed-off-by: Andiry Xu <andiry.xu@xxxxxxx>
Reported-by: Julian Sikorski <belegdol@xxxxxxxxx>
Tested-by: Julian Sikorski <belegdol@xxxxxxxxx>
Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-pci.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index ef98b38..d2a7332 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -33,6 +33,8 @@
#define PCI_VENDOR_ID_ETRON 0x1b6f
#define PCI_DEVICE_ID_ASROCK_P67 0x7023
+#define PCI_DEVICE_ID_NEC_uPD720200 0x0194
+
static const char hcd_name[] = "xhci_hcd";
/* called after powerup, by probe or system-pm "wakeup" */
@@ -74,8 +76,11 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
pdev->revision);
}
- if (pdev->vendor == PCI_VENDOR_ID_NEC)
+ if (pdev->vendor == PCI_VENDOR_ID_NEC) {
xhci->quirks |= XHCI_NEC_HOST;
+ if (pdev->device == PCI_DEVICE_ID_NEC_uPD720200)
+ xhci->quirks |= XHCI_RESET_ON_RESUME;
+ }
if (pdev->vendor == PCI_VENDOR_ID_AMD && xhci->hci_version == 0x96)
xhci->quirks |= XHCI_AMD_0x96_HOST;
--
1.7.7.3
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