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| author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2015-04-23 09:08:43 -0700 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2015-08-07 00:32:11 +0100 |
| commit | 16c8bd10b8a0454f3e3938a2bd1f99aff5442562 (patch) | |
| tree | af25be8cbdf434c23267533d23a49d841dc91452 /drivers/input | |
| parent | fd1797f04c8a2025802dcc41b5780fd3811fc907 (diff) | |
| download | lwn-16c8bd10b8a0454f3e3938a2bd1f99aff5442562.tar.gz lwn-16c8bd10b8a0454f3e3938a2bd1f99aff5442562.zip | |
Input: elantech - fix semi-mt protocol for v3 HW
commit 3c0213d17a09601e0c6c0ae0e27caf70d988290f upstream.
When the v3 hardware sees more than one finger, it uses the semi-mt
protocol to report the touches. However, it currently works when
num_fingers is 0, 1 or 2, but when it is 3 and above, it sends only 1
finger as if num_fingers was 1.
This confuses userspace which knows how to deal with extra fingers
when all the slots are used, but not when some are missing.
Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=90101
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/mouse/elantech.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c index b61ce4db18d6..00a7889c3e34 100644 --- a/drivers/input/mouse/elantech.c +++ b/drivers/input/mouse/elantech.c @@ -296,7 +296,7 @@ static void elantech_report_semi_mt_data(struct input_dev *dev, unsigned int x2, unsigned int y2) { elantech_set_slot(dev, 0, num_fingers != 0, x1, y1); - elantech_set_slot(dev, 1, num_fingers == 2, x2, y2); + elantech_set_slot(dev, 1, num_fingers >= 2, x2, y2); } /* |