[PATCH] uinput: Allow for 0/0 min/max on absolute axes.
STALE5665d
From: Peter Hutterer <hidden>
Date: 2011-03-31 05:05:16
Also in:
lkml
Subsystem:
input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Dmitry Torokhov, Linus Torvalds
Some devices provide absolute axes with min/max of 0/0 (e.g. wacom's ABS_MISC axis). Current uinput restrictions do not allow duplication of these devices and require hacks in userspace to work around this. If the kernel accepts physical devices with a min/max of 0/0, uinput shouldn't disallow the same range. Signed-off-by: Peter Hutterer <redacted> --- drivers/input/misc/uinput.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
index b941078..d7cc037 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c@@ -301,10 +301,14 @@ static int uinput_validate_absbits(struct input_dev *dev) int retval = 0; for (cnt = 0; cnt < ABS_CNT; cnt++) { + int min, max; if (!test_bit(cnt, dev->absbit)) continue; - if (input_abs_get_max(dev, cnt) <= input_abs_get_min(dev, cnt)) { + min = input_abs_get_min(dev, cnt); + max = input_abs_get_max(dev, cnt); + + if ((min != 0 || max != 0) && max <= min) { printk(KERN_DEBUG "%s: invalid abs[%02x] min:%d max:%d\n", UINPUT_NAME, cnt,
--
1.7.4.2