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HID: sony: Drop invalid Sixaxis input reports 

When connected via Bluetooth the sixaxis periodically sends reports with an ID
of 1, the second byte 0xff and the rest zeroed.  These reports are not related
to the controller state and must be dropped to avoid generating false input
events.

Link: http://www.spinics.net/lists/linux-bluetooth/msg63028.html
Signed-off-by: Frank Praznik <frank.praznik@oh.rr.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
This commit is contained in:
Frank Praznik 2015-07-23 19:01:16 -04:00 committed by Jiri Kosina
parent 2259b5bbaa
commit 8f5f0bc276
1 changed files with 11 additions and 0 deletions
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11
drivers/hid/hid-sony.c
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@ -1277,6 +1277,17 @@ static int sony_raw_event(struct hid_device *hdev, struct hid_report *report,
* has to be BYTE_SWAPPED before passing up to joystick interface
*/
if ((sc->quirks & SIXAXIS_CONTROLLER) && rd[0] == 0x01 && size == 49) {
/*
* When connected via Bluetooth the Sixaxis occasionally sends
* a report with the second byte 0xff and the rest zeroed.
*
* This report does not reflect the actual state of the
* controller must be ignored to avoid generating false input
* events.
*/
if (rd[1] == 0xff)
return -EINVAL;
swap(rd[41], rd[42]);
swap(rd[43], rd[44]);
swap(rd[45], rd[46]);