diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 269c1ee2da44..5839111ab4e0 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -48,6 +48,11 @@ static void hub_event(struct work_struct *work); /* synchronize hub-port add/remove and peering operations */ DEFINE_MUTEX(usb_port_peer_mutex); +static bool skip_extended_resume_delay = 1; +module_param(skip_extended_resume_delay, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(skip_extended_resume_delay, + "removes extra delay added to finish bus resume"); + /* cycle leds on hubs that aren't blinking for attention */ static bool blinkenlights = 0; module_param(blinkenlights, bool, S_IRUGO); @@ -3434,7 +3439,9 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg) /* drive resume for USB_RESUME_TIMEOUT msec */ dev_dbg(&udev->dev, "usb %sresume\n", (PMSG_IS_AUTO(msg) ? "auto-" : "")); - msleep(USB_RESUME_TIMEOUT); + if (!skip_extended_resume_delay) + usleep_range(USB_RESUME_TIMEOUT * 1000, + (USB_RESUME_TIMEOUT + 1) * 1000); /* Virtual root hubs can trigger on GET_PORT_STATUS to * stop resume signaling. Then finish the resume @@ -3443,7 +3450,7 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg) status = hub_port_status(hub, port1, &portstatus, &portchange); /* TRSMRCY = 10 msec */ - msleep(10); + usleep_range(10000, 10500); } SuspendCleared: