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Commit 9df89d85 authored by Xenia Ragiadakou's avatar Xenia Ragiadakou Committed by Greg Kroah-Hartman
Browse files

usbcore: set lpm_capable field for LPM capable root hubs 



This patch sets the lpm_capable field for root hubs with LPM capabilities.

Signed-off-by: default avatarXenia Ragiadakou <burzalodowa@gmail.com>
Reported-by: default avatarMartin MOKREJS <mmokrejs@gmail.com>
Suggested-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 6c74dada

drivers/usb/core/hcd.c

+1 −0
Original line number Diff line number Diff line
@@ -1033,6 +1033,7 @@ static int register_root_hub(struct usb_hcd *hcd) 
					dev_name(&usb_dev->dev), retval);

			return retval;

		}

		usb_dev->lpm_capable = usb_device_supports_lpm(usb_dev);

	}



	retval = usb_new_device (usb_dev);

drivers/usb/core/hub.c

+6 −1
Original line number Diff line number Diff line
@@ -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;

drivers/usb/core/usb.h

+1 −0
Original line number Diff line number Diff line
@@ -35,6 +35,7 @@ extern int usb_get_device_descriptor(struct usb_device *dev, 
		unsigned int size);

extern int usb_get_bos_descriptor(struct usb_device *dev);

extern void usb_release_bos_descriptor(struct usb_device *dev);

extern int usb_device_supports_lpm(struct usb_device *udev);

extern char *usb_cache_string(struct usb_device *udev, int index);

extern int usb_set_configuration(struct usb_device *dev, int configuration);

extern int usb_choose_configuration(struct usb_device *udev);