Input: ALPS - fix max coordinates for v5 and v7 protocols

Commit 3296f71cd2fde7a2ad52e66a27eae419f6328066 ("Input: ALPS - consolidate
setting protocol parameters") inadvertently moved call to
alps_dolphin_get_device_area() from v5 to v7 protocol, causing both
protocols report incorrect maximum values for X and Y axes which resulted
in crash in Synaptics X driver.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=94801
Reported-by: Santiago Gala <sgala@apache.org>
Reported-by: Pali Rohár <pali.rohar@gmail.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index 1bd15ebc01f2df5002eca38f7089a61701471f5d..33198b91bebfdcf622ac355bc599d97e43441b08 100644 (file)
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -2281,10 +2281,12 @@ static int alps_set_protocol(struct psmouse *psmouse,
                priv->set_abs_params = alps_set_abs_params_mt;
                priv->nibble_commands = alps_v3_nibble_commands;
                priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
-               priv->x_max = 1360;
-               priv->y_max = 660;
                priv->x_bits = 23;
                priv->y_bits = 12;
+
+               if (alps_dolphin_get_device_area(psmouse, priv))
+                       return -EIO;
+
                break;
 
        case ALPS_PROTO_V6:
@@ -2303,9 +2305,8 @@ static int alps_set_protocol(struct psmouse *psmouse,
                priv->set_abs_params = alps_set_abs_params_mt;
                priv->nibble_commands = alps_v3_nibble_commands;
                priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
-
-               if (alps_dolphin_get_device_area(psmouse, priv))
-                       return -EIO;
+               priv->x_max = 0xfff;
+               priv->y_max = 0x7ff;
 
                if (priv->fw_ver[1] != 0xba)
                        priv->flags |= ALPS_BUTTONPAD;