usb_control_msg() function should be called after the resume delay, or you'll encounter the below errors sometime. After the issue happens, have to re-plug the USB cable to recover. [ 837.483573] hub 2-3:1.0: hub_ext_port_status failed (err = -71) [ 837.490889] hub 2-3:1.0: hub_ext_port_status failed (err = -71) [ 837.506780] usb 2-3-port4: cannot disable (err = -71) Signed-off-by: AceLan Kao <acelan.kao@xxxxxxxxxxxxx> --- drivers/usb/core/hub.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index f229ad6952c0..2fb2816b0d38 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -3522,6 +3522,7 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg) } } + msleep(USB_RESUME_TIMEOUT); usb_lock_port(port_dev); /* Skip the initial Clear-Suspend step for a remote wakeup */ @@ -3544,7 +3545,6 @@ 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); /* Virtual root hubs can trigger on GET_PORT_STATUS to * stop resume signaling. Then finish the resume -- 2.17.1
