usbcore: check device's LPM capability

Check device's LPM capability by examining the bmAttibutes field of the
USB2.0 Extension Descriptor.

Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/usb.h b/include/linux/usb.h
index 90ab9dc1f080..1d00d9bc5d65 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -410,6 +410,7 @@ struct usb_tt;
  *      FIXME -- complete doc
  * @authenticated: Crypto authentication passed
  * @wusb: device is Wireless USB
+ * @lpm_capable: device supports LPM
  * @string_langid: language ID for strings
  * @product: iProduct string, if present (static)
  * @manufacturer: iManufacturer string, if present (static)
@@ -472,6 +473,7 @@ struct usb_device {
         unsigned authorized:1;
         unsigned authenticated:1;
         unsigned wusb:1;
+        unsigned lpm_capable:1;
         int string_langid;
 
         /* static strings from the device */