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| author |   Thomas Gleixner <tglx@linutronix.de> | 2019-05-06 12:04:12 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-05-06 12:04:12 +0200 |
| commit | fb4e0592654adb31bc6f3a738d6499b816a655d6 (patch) | |
| tree | e6edaf18cf3a7f49e93fb51de5a47f4b9e786f53 /drivers/usb/host/xhci-hub.c | |
| parent | irq_work: Do not raise an IPI when queueing work on the local CPU (diff) | |
| parent | iommu/dma-iommu: Remove iommu_dma_map_msi_msg() (diff) | |
| download | wireguard-linux-fb4e0592654adb31bc6f3a738d6499b816a655d6.tar.xz wireguard-linux-fb4e0592654adb31bc6f3a738d6499b816a655d6.zip | |
Merge tag 'irqchip-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/core
Pull irqchip updates from Marc Zyngier
- The huge (and terrifying) TI INTR/INTA set of drivers
- Rewrite of the stm32mp1-exti driver as a platform driver
- Update the IOMMU MSI mapping API to be RT friendly
- A number of cleanups and other low impact fixes
Diffstat (limited to 'drivers/usb/host/xhci-hub.c')
| -rw-r--r-- | drivers/usb/host/xhci-hub.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index e2eece693655..96a740543183 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -1545,20 +1545,25 @@ int xhci_bus_suspend(struct usb_hcd *hcd) port_index = max_ports; while (port_index--) { u32 t1, t2; - + int retries = 10; +retry: t1 = readl(ports[port_index]->addr); t2 = xhci_port_state_to_neutral(t1); portsc_buf[port_index] = 0; - /* Bail out if a USB3 port has a new device in link training */ - if ((hcd->speed >= HCD_USB3) && + /* + * Give a USB3 port in link training time to finish, but don't + * prevent suspend as port might be stuck + */ + if ((hcd->speed >= HCD_USB3) && retries-- && (t1 & PORT_PLS_MASK) == XDEV_POLLING) { - bus_state->bus_suspended = 0; spin_unlock_irqrestore(&xhci->lock, flags); - xhci_dbg(xhci, "Bus suspend bailout, port in polling\n"); - return -EBUSY; + msleep(XHCI_PORT_POLLING_LFPS_TIME); + spin_lock_irqsave(&xhci->lock, flags); + xhci_dbg(xhci, "port %d polling in bus suspend, waiting\n", + port_index); + goto retry; } - /* suspend ports in U0, or bail out for new connect changes */ if ((t1 & PORT_PE) && (t1 & PORT_PLS_MASK) == XDEV_U0) { if ((t1 & PORT_CSC) && wake_enabled) { |