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Dir : //usr/include/linux/usb/cdc-wdm.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * USB CDC Device Management userspace API definitions
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 */

#ifndef __LINUX_USB_CDC_WDM_H
#define __LINUX_USB_CDC_WDM_H

#include <linux/types.h>

/*
 * This IOCTL is used to retrieve the wMaxCommand for the device,
 * defining the message limit for both reading and writing.
 *
 * For CDC WDM functions this will be the wMaxCommand field of the
 * Device Management Functional Descriptor.
 */
#define IOCTL_WDM_MAX_COMMAND _IOR('H', 0xA0, __u16)

#endif /* __LINUX_USB_CDC_WDM_H */