diff options
Diffstat (limited to 'drivers/usb/core/hub.c')
| -rw-r--r-- | drivers/usb/core/hub.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index b98efae6a1cf..4310cc4b1cb5 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -676,6 +676,8 @@ static void hub_init_func3(struct work_struct *ws); static void hub_activate(struct usb_hub *hub, enum hub_activation_type type) { struct usb_device *hdev = hub->hdev; + struct usb_hcd *hcd; + int ret; int port1; int status; bool need_debounce_delay = false; @@ -714,6 +716,25 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type) usb_autopm_get_interface_no_resume( to_usb_interface(hub->intfdev)); return; /* Continues at init2: below */ + } else if (type == HUB_RESET_RESUME) { + /* The internal host controller state for the hub device + * may be gone after a host power loss on system resume. + * Update the device's info so the HW knows it's a hub. + */ + hcd = bus_to_hcd(hdev->bus); + if (hcd->driver->update_hub_device) { + ret = hcd->driver->update_hub_device(hcd, hdev, + &hub->tt, GFP_NOIO); + if (ret < 0) { + dev_err(hub->intfdev, "Host not " + "accepting hub info " + "update.\n"); + dev_err(hub->intfdev, "LS/FS devices " + "and hubs may not work " + "under this hub\n."); + } + } + hub_power_on(hub, true); } else { hub_power_on(hub, true); } |