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| author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2015-04-23 09:08:43 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-06-05 23:20:00 -0700 |
| commit | 1b577b9f2aadfca6935ceb96867d3b2def39cc9c (patch) | |
| tree | a7411e5bcf6fd9af070fcdbd954dd5d72f5049e5 /drivers | |
| parent | 35760dc525870d213ba2a77fb92e8652290b76df (diff) | |
| download | lwn-1b577b9f2aadfca6935ceb96867d3b2def39cc9c.tar.gz lwn-1b577b9f2aadfca6935ceb96867d3b2def39cc9c.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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -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 1af7df263368..dbd4f5ad3343 100644 --- a/drivers/input/mouse/elantech.c +++ b/drivers/input/mouse/elantech.c @@ -314,7 +314,7 @@ 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); } /* |