thermal: rcar: check every rcar_thermal_update_temp() return value

Every rcar_thermal_update_temp() return value will be checked.

And also, rcar_thermal_get_temp() always call
rcar_thermal_update_temp() by this patch.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

diff --git a/drivers/thermal/rcar_thermal.c b/drivers/thermal/rcar_thermal.c
index 96707a6..b012d90 100644 (file)
--- a/drivers/thermal/rcar_thermal.c
+++ b/drivers/thermal/rcar_thermal.c
@@ -75,12 +75,6 @@ struct rcar_thermal_priv {
 #define rcar_has_irq_support(priv)     ((priv)->common->base)
 #define rcar_id_to_shift(priv)         ((priv)->id * 8)
 
-#ifdef DEBUG
-# define rcar_force_update_temp(priv)  1
-#else
-# define rcar_force_update_temp(priv)  0
-#endif
-
 static const struct of_device_id rcar_thermal_dt_ids[] = {
        { .compatible = "renesas,rcar-thermal", },
        {},
@@ -209,9 +203,11 @@ err_out_unlock:
 static int rcar_thermal_get_temp(struct thermal_zone_device *zone, int *temp)
 {
        struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);
+       int ret;
 
-       if (!rcar_has_irq_support(priv) || rcar_force_update_temp(priv))
-               rcar_thermal_update_temp(priv);
+       ret = rcar_thermal_update_temp(priv);
+       if (ret < 0)
+               return ret;
 
        mutex_lock(&priv->lock);
        *temp =  MCELSIUS((priv->ctemp * 5) - 65);
@@ -305,11 +301,15 @@ static void rcar_thermal_work(struct work_struct *work)
 {
        struct rcar_thermal_priv *priv;
        int cctemp, nctemp;
+       int ret;
 
        priv = container_of(work, struct rcar_thermal_priv, work.work);
 
        rcar_thermal_get_temp(priv->zone, &cctemp);
-       rcar_thermal_update_temp(priv);
+       ret = rcar_thermal_update_temp(priv);
+       if (ret < 0)
+               return;
+
        rcar_thermal_irq_enable(priv);
 
        rcar_thermal_get_temp(priv->zone, &nctemp);
@@ -447,7 +447,9 @@ static int rcar_thermal_probe(struct platform_device *pdev)
                mutex_init(&priv->lock);
                INIT_LIST_HEAD(&priv->list);
                INIT_DELAYED_WORK(&priv->work, rcar_thermal_work);
-               rcar_thermal_update_temp(priv);
+               ret = rcar_thermal_update_temp(priv);
+               if (ret < 0)
+                       goto error_unregister;
 
                priv->zone = thermal_zone_device_register("rcar_thermal",
                                                1, 0, priv,