From: Benjamin Tissoires Date: Mon, 9 Mar 2015 05:33:36 +0000 (-0700) Subject: Input: synaptics - do not retrieve the board id on old firmwares X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b57a7128be24062b5b5b26032b7cd58f1651547e;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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 Acked-by: Hans de Goede Signed-off-by: Dmitry Torokhov --- diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index 2f42a712f3e0..2176874a41b1 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -250,6 +250,10 @@ 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];