diff options
| -rw-r--r-- | drivers/usb/core/hub.c | 43 |
1 files changed, 20 insertions, 23 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 55812a5ac66..46df5e60764 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -1409,10 +1409,12 @@ static int hub_port_status(struct usb_hub *hub, int port1, int ret; ret = get_port_status(hub->hdev, port1, &hub->status->port); - if (ret < 0) + if (ret < 4) { dev_err (hub->intfdev, "%s failed (err = %d)\n", __FUNCTION__, ret); - else { + if (ret >= 0) + ret = -EIO; + } else { *status = le16_to_cpu(hub->status->port.wPortStatus); *change = le16_to_cpu(hub->status->port.wPortChange); ret = 0; @@ -1760,6 +1762,12 @@ static int hub_port_resume(struct usb_hub *hub, int port1, struct usb_device *udev) { int status; + u16 portchange, portstatus; + + /* Skip the initial Clear-Suspend step for a remote wakeup */ + status = hub_port_status(hub, port1, &portstatus, &portchange); + if (status == 0 && !(portstatus & USB_PORT_STAT_SUSPEND)) + goto SuspendCleared; // dev_dbg(hub->intfdev, "resume port %d\n", port1); @@ -1773,9 +1781,6 @@ hub_port_resume(struct usb_hub *hub, int port1, struct usb_device *udev) "can't resume port %d, status %d\n", port1, status); } else { - u16 devstatus; - u16 portchange; - /* drive resume for at least 20 msec */ if (udev) dev_dbg(&udev->dev, "usb %sresume\n", @@ -1790,16 +1795,15 @@ hub_port_resume(struct usb_hub *hub, int port1, struct usb_device *udev) * stop resume signaling. Then finish the resume * sequence. */ - devstatus = portchange = 0; - status = hub_port_status(hub, port1, - &devstatus, &portchange); + status = hub_port_status(hub, port1, &portstatus, &portchange); +SuspendCleared: if (status < 0 - || (devstatus & LIVE_FLAGS) != LIVE_FLAGS - || (devstatus & USB_PORT_STAT_SUSPEND) != 0 + || (portstatus & LIVE_FLAGS) != LIVE_FLAGS + || (portstatus & USB_PORT_STAT_SUSPEND) != 0 ) { dev_dbg(hub->intfdev, "port %d status %04x.%04x after resume, %d\n", - port1, portchange, devstatus, status); + port1, portchange, portstatus, status); if (status >= 0) status = -ENODEV; } else { @@ -1860,23 +1864,16 @@ static int remote_wakeup(struct usb_device *udev) { int status = 0; - /* All this just to avoid sending a port-resume message - * to the parent hub! */ - usb_lock_device(udev); - usb_pm_lock(udev); if (udev->state == USB_STATE_SUSPENDED) { dev_dbg(&udev->dev, "usb %sresume\n", "wakeup-"); - /* TRSMRCY = 10 msec */ - msleep(10); - status = finish_port_resume(udev); + status = usb_autoresume_device(udev, 1); + + /* Give the interface drivers a chance to do something, + * then autosuspend the device again. */ if (status == 0) - udev->dev.power.power_state.event = PM_EVENT_ON; + usb_autosuspend_device(udev, 1); } - usb_pm_unlock(udev); - - if (status == 0) - usb_autoresume_device(udev, 0); usb_unlock_device(udev); return status; } |