From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
Current rcar_thermal_get_temp() returns latest temperature, but it might
not be updated if some HW issue happend. This means user might get
wrong temperature. This patch solved this issue.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
v2 -> v3
- no change
drivers/thermal/rcar_thermal.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/thermal/rcar_thermal.c b/drivers/thermal/rcar_thermal.c
index aaedf37..52493b4 100644
--- a/drivers/thermal/rcar_thermal.c
+++ b/drivers/thermal/rcar_thermal.c
@@ -199,9 +199,9 @@ static int rcar_thermal_update_temp(struct rcar_thermal_priv *priv)
dev_dbg(dev, "thermal%d %d -> %d\n", priv->id, priv->ctemp, ctemp);
- priv->ctemp = ctemp;
ret = 0;
err_out_unlock:
+ priv->ctemp = ctemp;
mutex_unlock(&priv->lock);
return ret;
}
@@ -209,6 +209,7 @@ 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;
if (!rcar_has_irq_support(priv) || rcar_force_update_temp(priv)) {
int ret = rcar_thermal_update_temp(priv);
@@ -217,9 +218,18 @@ static int rcar_thermal_get_temp(struct thermal_zone_device *zone, int *temp)
}
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;
}
--
1.9.1
--
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