From 2f48865db3322f8e74f51ff93b91e5c2916dd259 Mon Sep 17 00:00:00 2001 From: Marcel Holtmann Date: Wed, 4 Dec 2019 04:41:09 +0100 Subject: 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: Marcel Holtmann Signed-off-by: Jiri Kosina --- drivers/hid/hidraw.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/hid/hidraw.c') diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c index c3fc0ceb8096..5dfe80208932 100644 --- a/drivers/hid/hidraw.c +++ b/drivers/hid/hidraw.c @@ -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; -- cgit v1.2.3-59-g8ed1b