diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/core/hub.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index a739403a9e45..fcbad9e86328 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -614,6 +614,29 @@ static int hub_ext_port_status(struct usb_hub *hub, int port1, int type, ret = 0; } mutex_unlock(&hub->status_mutex); + + /* + * There is no need to lock status_mutex here, because status_mutex + * protects hub->status, and the phy driver only checks the port + * status without changing the status. + */ + if (!ret) { + struct usb_device *hdev = hub->hdev; + + /* + * Only roothub will be notified of port state changes, + * since the USB PHY only cares about changes at the next + * level. + */ + if (is_root_hub(hdev)) { + struct usb_hcd *hcd = bus_to_hcd(hdev->bus); + + if (hcd->usb_phy) + usb_phy_notify_port_status(hcd->usb_phy, + port1 - 1, *status, *change); + } + } + return ret; } |