[PATCH 4.5 222/238] Input: synaptics - handle spurious release of trackstick buttons, again

[Greg Kroah-Hartman]

4.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>

commit 82be788c96ed5978d3cb4a00079e26b981a3df3f upstream.

Looks like the fimware 8.2 still has the extra buttons spurious release
bug.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=114321
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/input/mouse/synaptics.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -862,8 +862,9 @@ static void synaptics_report_ext_buttons
 	if (!SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap))
 		return;
 
-	/* Bug in FW 8.1, buttons are reported only when ExtBit is 1 */
-	if (SYN_ID_FULL(priv->identity) == 0x801 &&
+	/* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
+	if ((SYN_ID_FULL(priv->identity) == 0x801 ||
+	     SYN_ID_FULL(priv->identity) == 0x802) &&
 	    !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 		return;