diff options
| author | Kevin Strasser <kevin.strasser@linux.intel.com> | 2015-06-16 10:35:30 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-07-22 15:45:03 -0700 |
| commit | 655fe4effe0f1f40e4f6ca6b3cc64a7fe0032183 (patch) | |
| tree | 00e7be3af68a08b25e6688fc8d4571124b81d704 /drivers/usb/core/hub.c | |
| parent | eb4861c3cef7f745df0d2a26b0f4287da0190424 (diff) | |
usbcore: add sysfs support to xHCI usb3 hardware LPM
Add a sysfs node to make it easier to verify if LPM is supported and being
enabled for USB 3.0 devices.
Signed-off-by: Kevin Strasser <kevin.strasser@linux.intel.com>
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 | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 43cb2f2e3b43..d9ce8f9d9acc 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -3950,6 +3950,8 @@ int usb_disable_lpm(struct usb_device *udev) if (usb_disable_link_state(hcd, udev, USB3_LPM_U2)) goto enable_lpm; + udev->usb3_lpm_enabled = 0; + return 0; enable_lpm: @@ -4007,6 +4009,8 @@ void usb_enable_lpm(struct usb_device *udev) usb_enable_link_state(hcd, udev, USB3_LPM_U1); usb_enable_link_state(hcd, udev, USB3_LPM_U2); + + udev->usb3_lpm_enabled = 1; } EXPORT_SYMBOL_GPL(usb_enable_lpm); |