Fields like HID_DG_CONTACTCOUNT are outside of the physical collection,
but within the application collection and report ID. Make sure to catch
those fields that are not part of the mt_report_id and return 0 so they
can be processed with the pen. Otherwise, the wrong HID_DG_CONTACTCOUNT
will be applied to cc_index and result in dereferencing a null pointer in
mt_touch_report.
Signed-off-by: Brent Adam <brenta...@smarttech.com>
---
drivers/hid/hid-multitouch.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 6a9b05b..2ee8800 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -781,6 +781,9 @@ static int mt_input_mapping(struct hid_device *hdev, struct
hid_input *hi,
*/
if (field->physical == HID_DG_STYLUS)
return 0;
+ else if ((field->physical == 0) &&
+ (field->report->id != td->mt_report_id))
+ return 0;
if (field->application == HID_DG_TOUCHSCREEN ||
field->application == HID_DG_TOUCHPAD)
--
2.1.4
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
