diff options
Diffstat (limited to 'drivers/usb/core/hub.c')
| -rw-r--r-- | drivers/usb/core/hub.c | 45 |
1 files changed, 37 insertions, 8 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 66006446679..3c8d8d1f993 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -449,11 +449,18 @@ static void hub_power_on(struct usb_hub *hub) msleep(max(pgood_delay, (unsigned) 100)); } -static void hub_quiesce(struct usb_hub *hub) +static inline void __hub_quiesce(struct usb_hub *hub) { - /* stop khubd and related activity */ + /* (nonblocking) khubd and related activity won't re-trigger */ hub->quiescing = 1; hub->activating = 0; + hub->resume_root_hub = 0; +} + +static void hub_quiesce(struct usb_hub *hub) +{ + /* (blocking) stop khubd and related activity */ + __hub_quiesce(hub); usb_kill_urb(hub->urb); if (hub->has_indicators) cancel_delayed_work(&hub->leds); @@ -467,6 +474,7 @@ static void hub_activate(struct usb_hub *hub) hub->quiescing = 0; hub->activating = 1; + hub->resume_root_hub = 0; status = usb_submit_urb(hub->urb, GFP_NOIO); if (status < 0) dev_err(hub->intfdev, "activate --> %d\n", status); @@ -1959,6 +1967,18 @@ static int hub_resume(struct usb_interface *intf) return 0; } +void usb_suspend_root_hub(struct usb_device *hdev) +{ + struct usb_hub *hub = hdev_to_hub(hdev); + + /* This also makes any led blinker stop retriggering. We're called + * from irq, so the blinker might still be scheduled. Caller promises + * that the root hub status URB will be canceled. + */ + __hub_quiesce(hub); + mark_quiesced(to_usb_interface(hub->intfdev)); +} + void usb_resume_root_hub(struct usb_device *hdev) { struct usb_hub *hub = hdev_to_hub(hdev); @@ -2616,21 +2636,30 @@ static void hub_events(void) intf = to_usb_interface(hub->intfdev); hub_dev = &intf->dev; - dev_dbg(hub_dev, "state %d ports %d chg %04x evt %04x\n", + i = hub->resume_root_hub; + + dev_dbg(hub_dev, "state %d ports %d chg %04x evt %04x%s\n", hdev->state, hub->descriptor ? hub->descriptor->bNbrPorts : 0, /* NOTE: expects max 15 ports... */ (u16) hub->change_bits[0], - (u16) hub->event_bits[0]); + (u16) hub->event_bits[0], + i ? ", resume root" : ""); usb_get_intf(intf); - i = hub->resume_root_hub; spin_unlock_irq(&hub_event_lock); - /* Is this is a root hub wanting to be resumed? */ - if (i) - usb_resume_device(hdev); + /* Is this is a root hub wanting to reactivate the downstream + * ports? If so, be sure the interface resumes even if its + * stub "device" node was never suspended. + */ + if (i) { + extern void dpm_runtime_resume(struct device *); + + dpm_runtime_resume(&hdev->dev); + dpm_runtime_resume(&intf->dev); + } /* Lock the device, then check to see if we were * disconnected while waiting for the lock to succeed. */ |