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| author | Jason Gerecke <killertofu@gmail.com> | 2021-07-19 13:55:31 -0700 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2021-07-28 11:43:48 +0200 |
| commit | 7cc8524f65ce1a350042836c7cf837046aaa6e21 (patch) | |
| tree | a5615e50436e5701a0c325afdecb301e7a698671 /drivers/hid | |
| parent | 6ca2350e11f09d5d3e53777d1eff8ff6d300ed93 (diff) | |
| download | lwn-7cc8524f65ce1a350042836c7cf837046aaa6e21.tar.gz lwn-7cc8524f65ce1a350042836c7cf837046aaa6e21.zip | |
HID: wacom: Skip processing of touches with negative slot values
The `input_mt_get_slot_by_key` function may return a negative value
if an error occurs (e.g. running out of slots). If this occurs we
should really avoid reporting any data for the slot.
Signed-off-by: Ping Cheng <ping.cheng@wacom.com>
Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/wacom_wac.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c index 496a000ef862..81ba642adcb7 100644 --- a/drivers/hid/wacom_wac.c +++ b/drivers/hid/wacom_wac.c @@ -2548,6 +2548,9 @@ static void wacom_wac_finger_slot(struct wacom_wac *wacom_wac, int slot; slot = input_mt_get_slot_by_key(input, hid_data->id); + if (slot < 0) + return; + input_mt_slot(input, slot); input_mt_report_slot_state(input, MT_TOOL_FINGER, prox); } |