3.13.11-ckt19 -stable review patch.  If anyone has any objections, please let 
me know.

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

From: Benjamin Tissoires <[email protected]>

commit b57a7128be24062b5b5b26032b7cd58f1651547e upstream.

The board id capability has been added in firmware 7.5.

Signed-off-by: Benjamin Tissoires <[email protected]>
Acked-by: Hans de Goede <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>
Signed-off-by: Kamal Mostafa <[email protected]>
---
 drivers/input/mouse/synaptics.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 5545b78..a9642f5 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -168,6 +168,10 @@ static int synaptics_board_id(struct psmouse *psmouse)
        struct synaptics_data *priv = psmouse->private;
        unsigned char bid[3];
 
+       /* firmwares prior 7.5 have no board_id encoded */
+       if (SYN_ID_FULL(priv->identity) < 0x705)
+               return 0;
+
        if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
                return -1;
        priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
-- 
1.9.1

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