[RESEND PATCH] thermal: helpers: Check return value of get_temp

[Rhyland Klein]

Check the return value of get_temp, which can fail. If it does, then
unlock and return the error code.

Signed-off-by: Rhyland Klein <rkl...@nvidia.com>
---
 drivers/thermal/thermal_helpers.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/thermal/thermal_helpers.c 
b/drivers/thermal/thermal_helpers.c
index 5e1c160944c9..dc260749f8d6 100644
--- a/drivers/thermal/thermal_helpers.c
+++ b/drivers/thermal/thermal_helpers.c
@@ -90,6 +90,10 @@ int thermal_zone_get_temp(struct thermal_zone_device *tz, 
int *temp)
        mutex_lock(&tz->lock);
 
        ret = tz->ops->get_temp(tz, temp);
+       if (!ret) {
+               mutex_unlock(&tz->lock);
+               goto exit;
+       }
 
        if (IS_ENABLED(CONFIG_THERMAL_EMULATION) && tz->emul_temperature) {
                for (count = 0; count < tz->trips; count++) {
-- 
1.9.1