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Commit a8ef36bc authored by Sarah Bailey's avatar Sarah Bailey Committed by Greg Kroah-Hartman
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USB: Add usb_endpoint_xfer_control to usb.h 



Added a function to check if an endpoint is a control endpoint.
There were similar functions for bulk, interrupt, and isoc,
but not for control endpoints.

Signed-off-by: default avatarSarah Bailey <saharabeara@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 7ca46b86

include/linux/usb.h

+12 −0
Original line number Diff line number Diff line
@@ -556,6 +556,18 @@ static inline int usb_endpoint_xfer_bulk(const struct usb_endpoint_descriptor *e 
		USB_ENDPOINT_XFER_BULK);

}



/**

 * usb_endpoint_xfer_control - check if the endpoint has control transfer type

 * @epd: endpoint to be checked

 *

 * Returns true if the endpoint is of type control, otherwise it returns false.

 */

static inline int usb_endpoint_xfer_control(const struct usb_endpoint_descriptor *epd)

{

	return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==

		USB_ENDPOINT_XFER_CONTROL);

}



/**

 * usb_endpoint_xfer_int - check if the endpoint has interrupt transfer type

 * @epd: endpoint to be checked