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authorKuninori Morimoto <kuninori.morimoto.gx@renesas.com>2015-12-15 04:18:13 +0300
committerEduardo Valentin <edubezval@gmail.com>2016-01-07 05:06:39 +0300
commit5440c40b900fa561add48a7e70e9c892f0551387 (patch)
tree08bb806d88c4806b66a41c181a6093e25eb7ef94 /drivers/thermal/rcar_thermal.c
parentffbcdf8a759c6dde71c6c4f646a552f7637bcca7 (diff)
downloadlinux-5440c40b900fa561add48a7e70e9c892f0551387.tar.xz
thermal: rcar: rcar_thermal_get_temp() return error if strange temp
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'drivers/thermal/rcar_thermal.c')
-rw-r--r--drivers/thermal/rcar_thermal.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/thermal/rcar_thermal.c b/drivers/thermal/rcar_thermal.c
index fb81fd7e6b81..44b9c485157d 100644
--- a/drivers/thermal/rcar_thermal.c
+++ b/drivers/thermal/rcar_thermal.c
@@ -203,6 +203,7 @@ 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 tmp;
int ret;
ret = rcar_thermal_update_temp(priv);
@@ -210,9 +211,18 @@ static int rcar_thermal_get_temp(struct thermal_zone_device *zone, int *temp)
return ret;
mutex_lock(&priv->lock);
- *temp = MCELSIUS((priv->ctemp * 5) - 65);
+ tmp = MCELSIUS((priv->ctemp * 5) - 65);
mutex_unlock(&priv->lock);
+ if ((tmp < MCELSIUS(-45)) || (tmp > MCELSIUS(125))) {
+ struct device *dev = rcar_priv_to_dev(priv);
+
+ dev_err(dev, "it couldn't measure temperature correctly\n");
+ return -EIO;
+ }
+
+ *temp = tmp;
+
return 0;
}