From 1ff4df56846d10379939166713bb2908e6a5ee0e Mon Sep 17 00:00:00 2001 From: Andiry Xu Date: Fri, 23 Sep 2011 14:19:48 -0700 Subject: 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 Signed-off-by: Sarah Sharp Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hub.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'drivers/usb/core/hub.c') diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 7a2514322bf..4ffc3d1bd9e 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -3083,8 +3083,14 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1, goto fail; } - if (udev->wusb == 0 && le16_to_cpu(udev->descriptor.bcdUSB) >= 0x0201) - usb_get_bos_descriptor(udev); + if (udev->wusb == 0 && le16_to_cpu(udev->descriptor.bcdUSB) >= 0x0201) { + retval = usb_get_bos_descriptor(udev); + if (!retval) { + if (udev->bos->ext_cap && (USB_LPM_SUPPORT & + le32_to_cpu(udev->bos->ext_cap->bmAttributes))) + udev->lpm_capable = 1; + } + } retval = 0; /* notify HCD that we have a device connected and addressed */ -- cgit v1.2.3