Commit 2f48865d authored by Marcel Holtmann's avatar Marcel Holtmann Committed by Jiri Kosina
Browse files

HID: hidraw: add support uniq ioctl 



Add support for reading out the uniq information from the underlying HID
device. This might be the iSerialNumber in case of USB or the BD_ADDR in
case of Bluetooth.

Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent d004701d

drivers/hid/hidraw.c

+9 −0
Original line number Diff line number Diff line
@@ -450,6 +450,15 @@ static long hidraw_ioctl(struct file *file, unsigned int cmd, 
						-EFAULT : len;

					break;

				}



				if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGRAWUNIQ(0))) {

					int len = strlen(hid->uniq) + 1;

					if (len > _IOC_SIZE(cmd))

						len = _IOC_SIZE(cmd);

					ret = copy_to_user(user_arg, hid->uniq, len) ?

						-EFAULT : len;

					break;

				}

			}



		ret = -ENOTTY;

include/uapi/linux/hidraw.h

+1 −0
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ struct hidraw_devinfo { 
/* The first byte of SFEATURE and GFEATURE is the report number */

#define HIDIOCSFEATURE(len)    _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x06, len)

#define HIDIOCGFEATURE(len)    _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x07, len)

#define HIDIOCGRAWUNIQ(len)     _IOC(_IOC_READ, 'H', 0x08, len)



#define HIDRAW_FIRST_MINOR 0

#define HIDRAW_MAX_DEVICES 64

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