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Subject[PATCH] xhci: Add reset on resume quirk for asrock p67 host
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 far back as 2.6.34.

Signed-off-by: Maarten Lankhorst <m.b.lankhorst@gmail.com>
Cc: stable@kernel.org
---
I have no idea if the vendor name is correct. lspci didn't list it.
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 17541d0..cb16de2 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -29,6 +29,9 @@
#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" */
@@ -134,6 +137,11 @@ static int xhci_pci_setup(struct usb_hcd *hcd)
xhci->quirks |= XHCI_EP_LIMIT_QUIRK;
xhci->limit_active_eps = 64;
}
+ 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");
+ }

/* Make sure the HC is halted. */
retval = xhci_halt(xhci);
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 06e7023..42fd032 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -759,6 +759,8 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
msleep(100);

spin_lock_irq(&xhci->lock);
+ if (xhci->quirks & XHCI_RESET_ON_RESUME)
+ hibernated = 0;

if (!hibernated) {
/* step 1: restore register */
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 7d1ea3b..b769a75 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1308,6 +1308,7 @@ struct xhci_hcd {
*/
#define XHCI_EP_LIMIT_QUIRK (1 << 5)
#define XHCI_BROKEN_MSI (1 << 6)
+#define XHCI_RESET_ON_RESUME (1 << 7)
unsigned int num_active_eps;
unsigned int limit_active_eps;
/* There are two roothubs to keep track of bus suspend info for */



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