From b082e424ed520c59ea87737e4fe58506725cdf60 Mon Sep 17 00:00:00 2001 From: Kai-Heng Feng Date: Thu, 8 Mar 2018 17:17:17 +0200 Subject: [PATCH] xhci: Fix front USB ports on ASUS PRIME B350M-A 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 Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman [bwh: Backported to 3.16: adjust context] Signed-off-by: Ben Hutchings --- drivers/usb/host/xhci-pci.c | 3 +++ drivers/usb/host/xhci.c | 3 +++ drivers/usb/host/xhci.h | 1 + 3 files changed, 7 insertions(+) diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index 7df1edc2c199..33cf347e754b 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -124,6 +124,9 @@ 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 45654fffa7a5..a30b16b3c847 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -922,6 +922,9 @@ int xhci_suspend(struct xhci_hcd *xhci, bool do_wakeup) clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); del_timer_sync(&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 08057459c8e6..df47cb8e5ec8 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1571,6 +1571,7 @@ struct xhci_hcd { #define XHCI_MISSING_CAS (1 << 24) #define XHCI_U2_DISABLE_WAKE (1 << 27) #define XHCI_ASMEDIA_MODIFY_FLOWCONTROL (1 << 28) +#define XHCI_SUSPEND_DELAY (1 << 30) unsigned int num_active_eps; unsigned int limit_active_eps; /* There are two roothubs to keep track of bus suspend info for */