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Subject[039/107] xhci: Add reset on resume quirk for asrock p67 host
2.6.39-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Maarten Lankhorst <m.b.lankhorst@gmail.com>

commit c877b3b2ad5cb9d4fe523c5496185cc328ff3ae9 upstream.

The asrock p67 xhci controller completely dies on resume, add a
quirk for this, to bring the host back online after a suspend.

This should be backported to stable kernels as old as 2.6.37.

Signed-off-by: Maarten Lankhorst <m.b.lankhorst@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/usb/host/xhci-pci.c | 8 ++++++++
drivers/usb/host/xhci.c | 2 ++
drivers/usb/host/xhci.h | 1 +
3 files changed, 11 insertions(+)

--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -28,6 +28,9 @@
#define PCI_VENDOR_ID_FRESCO_LOGIC 0x1b73
#define PCI_DEVICE_ID_FRESCO_LOGIC_PDK 0x1000

+#define PCI_VENDOR_ID_ETRON 0x1b6f
+#define PCI_DEVICE_ID_ASROCK_P67 0x7023
+
static const char hcd_name[] = "xhci_hcd";

/* called after powerup, by probe or system-pm "wakeup" */
@@ -120,6 +123,11 @@ static int xhci_pci_setup(struct usb_hcd
"has broken MSI implementation\n",
pdev->revision);
}
+ if (pdev->vendor == PCI_VENDOR_ID_ETRON &&
+ pdev->device == PCI_DEVICE_ID_ASROCK_P67) {
+ xhci->quirks |= XHCI_RESET_ON_RESUME;
+ xhci_dbg(xhci, "QUIRK: Resetting on resume\n");
+ }

if (pdev->vendor == PCI_VENDOR_ID_NEC)
xhci->quirks |= XHCI_NEC_HOST;
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -759,6 +759,8 @@ int xhci_resume(struct xhci_hcd *xhci, b
msleep(100);

spin_lock_irq(&xhci->lock);
+ if (xhci->quirks & XHCI_RESET_ON_RESUME)
+ hibernated = true;

if (!hibernated) {
/* step 1: restore register */
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1287,6 +1287,7 @@ struct xhci_hcd {
#define XHCI_NEC_HOST (1 << 2)
#define XHCI_AMD_PLL_FIX (1 << 3)
#define XHCI_BROKEN_MSI (1 << 6)
+#define XHCI_RESET_ON_RESUME (1 << 7)
/* There are two roothubs to keep track of bus suspend info for */
struct xhci_bus_state bus_state[2];
/* Is each xHCI roothub port a USB 3.0, USB 2.0, or USB 1.1 port? */



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