From: Daniel Martin <consume.noise@xxxxxxxxx> This patch has been added to the 3.18 stable tree. If you have any objections, please let us know. =============== [ Upstream commit ac097930f0730a9b777737de2b51e0fc49d2be7a ] Query the min dimensions even if the check SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 fails, but we know that the firmware version 8.1 is safe. With that we don't need quirks for post-2013 models anymore as they expose correct min and max dimensions. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=91541 Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Daniel Martin <consume.noise@xxxxxxxxx> re-order the tests to check SYN_CAP_MIN_DIMENSIONS even on FW 8.1 Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx> Acked-by: Hans de Goede <hdegoede@xxxxxxxxxx> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx> --- drivers/input/mouse/synaptics.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index 47c5dca..87c37f7 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -368,8 +368,14 @@ static int synaptics_resolution(struct psmouse *psmouse) } } - if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 && - SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) { + if (SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c) && + (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 || + /* + * Firmware v8.1 does not report proper number of extended + * capabilities, but has been proven to report correct min + * coordinates. + */ + SYN_ID_FULL(priv->identity) == 0x801)) { if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) { psmouse_warn(psmouse, "device claims to have min coordinates query, but I'm not able to read it.\n"); -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html