This ioctl is the counterpart to EVIOCGVERSION and returns the
uinput-version the kernel was compiled with.
Reviewed-by: Peter Hutterer <peter.hutterer@xxxxxxxxx>
Signed-off-by: David Herrmann <dh.herrmann@xxxxxxxxx>
---
drivers/input/misc/uinput.c | 6 ++++++
include/uapi/linux/uinput.h | 9 +++++++++
2 files changed, 15 insertions(+)
diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
index 615324c..a2a3895 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c
@@ -722,6 +722,12 @@ static long uinput_ioctl_handler(struct file *file, unsigned int cmd,
}
switch (cmd) {
+ case UI_GET_VERSION:
+ if (put_user(UINPUT_VERSION,
+ (unsigned int __user*)p))
+ retval = -EFAULT;
+ goto out;
+
case UI_DEV_CREATE:
retval = uinput_create_device(udev);
goto out;
diff --git a/include/uapi/linux/uinput.h b/include/uapi/linux/uinput.h
index 0389b48..19339cf 100644
--- a/include/uapi/linux/uinput.h
+++ b/include/uapi/linux/uinput.h
@@ -84,6 +84,15 @@ struct uinput_ff_erase {
*/
#define UI_GET_SYSNAME(len) _IOC(_IOC_READ, UINPUT_IOCTL_BASE, 300, len)
+/**
+ * UI_GET_VERSION - Return uinput version of the kernel
+ *
+ * This writes the kernel's uinput version into the integer pointed to by the
+ * ioctl argument. The uinput-version is hard-coded in the kernel and
+ * independent of the uinput device.
+ */
+#define UI_GET_VERSION _IOR(UINPUT_IOCTL_BASE, 301, unsigned int)
+
/*
* To write a force-feedback-capable driver, the upload_effect
* and erase_effect callbacks in input_dev must be implemented.
--
2.0.2
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