[PATCH] thermal: imx_scu_thermal: prevent boot hang with zero pdata

[Anatolij Gustschin]

Should initialization of pdata values have failed for some reason,
we end up in endless loop when getting the CPU temperature value
and can not boot. Check alert value in pdata and only retry reading
temperature if alert value is not zero. Also shorten the temperature
info string.

Signed-off-by: Anatolij Gustschin <agust at denx.de>
---
 drivers/thermal/imx_scu_thermal.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/thermal/imx_scu_thermal.c b/drivers/thermal/imx_scu_thermal.c
index 321f905e3a..83ec753802 100644
--- a/drivers/thermal/imx_scu_thermal.c
+++ b/drivers/thermal/imx_scu_thermal.c
@@ -61,13 +61,15 @@ int imx_sc_thermal_get_temp(struct udevice *dev, int *temp)
 		return ret;
 
 	while (cpu_temp >= pdata->alert) {
-		printf("CPU Temperature (%dC) has beyond alert (%dC), close to critical (%dC)",
+		printf("CPU Temperature (%dC) beyond alert (%dC), close to critical (%dC)",
 		       cpu_temp, pdata->alert, pdata->critical);
 		puts(" waiting...\n");
 		mdelay(pdata->polling_delay);
 		ret = read_temperature(dev, &cpu_temp);
 		if (ret)
 			return ret;
+		if (cpu_temp >= pdata->alert && !pdata->alert)
+			break;
 	}
 
 	*temp = cpu_temp / 1000;
-- 
2.17.1