3.16.57-rc1 review patch. If anyone has any objections, please let me know.
------------------ From: Kai-Heng Feng <[email protected]> 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 <[email protected]> Signed-off-by: Mathias Nyman <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> [bwh: Backported to 3.16: adjust context] Signed-off-by: Ben Hutchings <[email protected]> --- drivers/usb/host/xhci-pci.c | 3 +++ drivers/usb/host/xhci.c | 3 +++ drivers/usb/host/xhci.h | 1 + 3 files changed, 7 insertions(+) --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -124,6 +124,9 @@ static void xhci_pci_quirks(struct devic 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; --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -922,6 +922,9 @@ int xhci_suspend(struct xhci_hcd *xhci, 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); --- 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 */
