diff options
| author | Xenia Ragiadakou <burzalodowa@gmail.com> | 2013-08-31 18:09:12 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-11-20 12:27:48 -0800 |
| commit | a5ca6f06feb5eafb05ac825b900923f06a2a6c1f (patch) | |
| tree | b1d2a356b41450469086b7c24e186588f54383f4 /drivers/usb/core/hub.c | |
| parent | 386f000abc920c7de7c06a89fc11566fc70ce4ad (diff) | |
usbcore: set lpm_capable field for LPM capable root hubs
commit 9df89d85b407690afa46ddfbccc80bec6869971d upstream.
This patch sets the lpm_capable field for root hubs with LPM capabilities.
Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Reported-by: Martin MOKREJS <mmokrejs@gmail.com>
Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/core/hub.c')
| -rw-r--r-- | drivers/usb/core/hub.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 896532d3fc2d..c8b9fa0e9275 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -135,7 +135,7 @@ struct usb_hub *usb_hub_to_struct_hub(struct usb_device *hdev) return usb_get_intfdata(hdev->actconfig->interface[0]); } -static int usb_device_supports_lpm(struct usb_device *udev) +int usb_device_supports_lpm(struct usb_device *udev) { /* USB 2.1 (and greater) devices indicate LPM support through * their USB 2.0 Extended Capabilities BOS descriptor. @@ -156,6 +156,11 @@ static int usb_device_supports_lpm(struct usb_device *udev) "Power management will be impacted.\n"); return 0; } + + /* udev is root hub */ + if (!udev->parent) + return 1; + if (udev->parent->lpm_capable) return 1; |