xhci: Fix front USB ports on ASUS PRIME B350M-A

BugLink: http://bugs.launchpad.net/bugs/1756978
commit 191edc5e2e515aab1075a3f0ef23599e80be5f59 upstream.

When a USB device gets plugged on ASUS PRIME B350M-A's front ports, the
xHC stops working:
[  549.114587] xhci_hcd 0000:02:00.0: WARN: xHC CMD_RUN timeout
[  549.114608] suspend_common(): xhci_pci_suspend+0x0/0xc0 returns -110
[  549.114638] xhci_hcd 0000:02:00.0: can't suspend (hcd_pci_runtime_suspend returned -110)

Delay before running xHC command CMD_RUN can workaround the issue.

Use a new quirk to make the delay only targets to the affected xHC.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 1aad89b8aba0b5b5b4610aa161bc7379ba45fbb7..f68f364c77d551bd2eb50d06bdfe59b78750357a 100644 (file)
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -122,6 +122,9 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
        if (pdev->vendor == PCI_VENDOR_ID_AMD && usb_amd_find_chipset_info())
                xhci->quirks |= XHCI_AMD_PLL_FIX;
 
+       if (pdev->vendor == PCI_VENDOR_ID_AMD && pdev->device == 0x43bb)
+               xhci->quirks |= XHCI_SUSPEND_DELAY;
+
        if (pdev->vendor == PCI_VENDOR_ID_AMD)
                xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 1bdcbf535720237bf9ac49d3a2b3d49d1f763e37..128931a8268a4bfe7138555fc0c6f0d20806133e 100644 (file)
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -887,6 +887,9 @@ int xhci_suspend(struct xhci_hcd *xhci, bool do_wakeup)
        clear_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
        del_timer_sync(&xhci->shared_hcd->rh_timer);
 
+       if (xhci->quirks & XHCI_SUSPEND_DELAY)
+               usleep_range(1000, 1500);
+
        spin_lock_irq(&xhci->lock);
        clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
        clear_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags);

diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 8646c64e2cba014908f02511e6bf878f4111ae54..d606ef0c105a59c1dd359c905c32336d9176cf43 100644 (file)
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1823,6 +1823,7 @@ struct xhci_hcd {
 /* Reserved. It was XHCI_U2_DISABLE_WAKE */
 #define XHCI_ASMEDIA_MODIFY_FLOWCONTROL        (1 << 28)
 #define XHCI_HW_LPM_DISABLE    (1 << 29)
+#define XHCI_SUSPEND_DELAY     (1 << 30)
 
        unsigned int            num_active_eps;
        unsigned int            limit_active_eps;