diff options
| author | Douglas Anderson <dianders@chromium.org> | 2019-04-17 17:13:53 -0700 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2019-05-03 09:13:47 +0300 |
| commit | 7a6127e39a16c97b505f13352238567fdc3f79a2 (patch) | |
| tree | 5b6362eba21c4b3b879fa074f2837bdc26a13620 /drivers/usb | |
| parent | 6f6d70597c15b2a406afa541517e6ad35f56a8a3 (diff) | |
| download | linux-7a6127e39a16c97b505f13352238567fdc3f79a2.tar.gz | |
USB: Export usb_wakeup_enabled_descendants()
In (e583d9d USB: global suspend and remote wakeup don't mix) we introduced wakeup_enabled_descendants() as a static function. We'd like to use this function in USB controller drivers to know if we should keep the controller on during suspend time, since doing so has a power impact. Signed-off-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/core/hub.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 8d4631c81b9f..5e8f3fa7ae5a 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -3174,13 +3174,14 @@ static int usb_disable_remote_wakeup(struct usb_device *udev) } /* Count of wakeup-enabled devices at or below udev */ -static unsigned wakeup_enabled_descendants(struct usb_device *udev) +unsigned usb_wakeup_enabled_descendants(struct usb_device *udev) { struct usb_hub *hub = usb_hub_to_struct_hub(udev); return udev->do_remote_wakeup + (hub ? hub->wakeup_enabled_descendants : 0); } +EXPORT_SYMBOL_GPL(usb_wakeup_enabled_descendants); /* * usb_port_suspend - suspend a usb device's upstream port @@ -3282,7 +3283,7 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg) * Therefore we will turn on the suspend feature if udev or any of its * descendants is enabled for remote wakeup. */ - else if (PMSG_IS_AUTO(msg) || wakeup_enabled_descendants(udev) > 0) + else if (PMSG_IS_AUTO(msg) || usb_wakeup_enabled_descendants(udev) > 0) status = set_port_feature(hub->hdev, port1, USB_PORT_FEAT_SUSPEND); else { @@ -3687,7 +3688,7 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg) } if (udev) hub->wakeup_enabled_descendants += - wakeup_enabled_descendants(udev); + usb_wakeup_enabled_descendants(udev); } if (hdev->do_remote_wakeup && hub->quirk_check_port_auto_suspend) { |