Input: alps - change decode function prototype to return an int

So that decode functions can return a failure when appropriate.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

2 files changed, 10 insertions, 4 deletions

diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index 5026600278d3..8f794913f4cd 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -538,7 +538,7 @@ static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
         f->ts_middle = !!(p[3] & 0x40);
 }
 
-static void alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
+static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
                                  struct psmouse *psmouse)
 {
         f->first_mp = !!(p[4] & 0x40);
@@ -558,9 +558,11 @@ static void alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
         f->pressure = p[5] & 0x7f;
 
         alps_decode_buttons_v3(f, p);
+
+        return 0;
 }
 
-static void alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
+static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
                                  struct psmouse *psmouse)
 {
         alps_decode_pinnacle(f, p, psmouse);
@@ -570,9 +572,11 @@ static void alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
         f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
         f->x_map |= (p[5] & 0x10) << 11;
         f->y_map |= (p[5] & 0x20) << 6;
+
+        return 0;
 }
 
-static void alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
+static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
                                 struct psmouse *psmouse)
 {
         u64 palm_data = 0;
@@ -605,6 +609,8 @@ static void alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
                 f->x_map = (palm_data >> priv->y_bits) &
                            (BIT(priv->x_bits) - 1);
         }
+
+        return 0;
 }
 
 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
diff --git a/drivers/input/mouse/alps.h b/drivers/input/mouse/alps.h
index ee841e53ef9c..17e3ae39bcb7 100644
--- a/drivers/input/mouse/alps.h
+++ b/drivers/input/mouse/alps.h
@@ -157,7 +157,7 @@ struct alps_data {
 
         int (*hw_init)(struct psmouse *psmouse);
         void (*process_packet)(struct psmouse *psmouse);
-        void (*decode_fields)(struct alps_fields *f, unsigned char *p,
+        int (*decode_fields)(struct alps_fields *f, unsigned char *p,
                               struct psmouse *psmouse);
         void (*set_abs_params)(struct alps_data *priv, struct input_dev *dev1);