diff options
Diffstat (limited to 'drivers/usb/core/generic.c')
-rw-r--r-- | drivers/usb/core/generic.c | 45 |
1 files changed, 16 insertions, 29 deletions
diff --git a/drivers/usb/core/generic.c b/drivers/usb/core/generic.c index d363b0ea734..4cbe7b33951 100644 --- a/drivers/usb/core/generic.c +++ b/drivers/usb/core/generic.c @@ -196,20 +196,15 @@ static int generic_suspend(struct usb_device *udev, pm_message_t msg) { int rc; - rc = usb_port_suspend(udev); - - /* Root hubs don't have upstream ports to suspend, - * so the line above won't do much for them. We have to - * shut down their downstream HC-to-USB interfaces manually, - * by doing a bus (or "global") suspend. + /* Normal USB devices suspend through their upstream port. + * Root hubs don't have upstream ports to suspend, + * so we have to shut down their downstream HC-to-USB + * interfaces manually by doing a bus (or "global") suspend. */ - if (rc == 0 && !udev->parent) { - rc = hcd_bus_suspend(udev->bus); - if (rc) { - dev_dbg(&udev->dev, "'global' suspend %d\n", rc); - usb_port_resume(udev); - } - } + if (!udev->parent) + rc = hcd_bus_suspend(udev); + else + rc = usb_port_suspend(udev); return rc; } @@ -217,25 +212,17 @@ static int generic_resume(struct usb_device *udev) { int rc; - if (udev->reset_resume) + /* Normal USB devices resume/reset through their upstream port. + * Root hubs don't have upstream ports to resume or reset, + * so we have to start up their downstream HC-to-USB + * interfaces manually by doing a bus (or "global") resume. + */ + if (!udev->parent) + rc = hcd_bus_resume(udev); + else if (udev->reset_resume) rc = usb_reset_suspended_device(udev); else rc = usb_port_resume(udev); - - /* Root hubs don't have upstream ports to resume or reset, - * so the line above won't do much for them. We have to - * start up their downstream HC-to-USB interfaces manually, - * by doing a bus (or "global") resume. - */ - if (rc == 0 && !udev->parent) { - rc = hcd_bus_resume(udev->bus); - if (rc) - dev_dbg(&udev->dev, "'global' resume %d\n", rc); - else { - /* TRSMRCY = 10 msec */ - msleep(10); - } - } return rc; } |