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Input: synaptics - do not retrieve the board id on old firmwares
The board id capability has been added in firmware 7.5. Cc: stable@vger.kernel.org Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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@ -250,6 +250,10 @@ static int synaptics_board_id(struct psmouse *psmouse)
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struct synaptics_data *priv = psmouse->private;
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unsigned char bid[3];
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/* firmwares prior 7.5 have no board_id encoded */
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if (SYN_ID_FULL(priv->identity) < 0x705)
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return 0;
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if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
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return -1;
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priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
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