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From 18f50eae474edc716b01959fad6898c8553b131c Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Wed, 13 May 2015 10:52:33 +0200
Subject: [PATCH 14/76] thermal: Add comment explaining test for critical
temperature
The code testing if a temperature should be emulated or not is
not obvious. Add a comment explaining why this test is done.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
---
drivers/thermal/thermal_core.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 3e0fe55..e204deb 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -435,6 +435,11 @@ int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp)
}
}
+ /*
+ * Only allow emulating a temperature when the real temperature
+ * is below the critical temperature so that the emulation code
+ * cannot hide critical conditions.
+ */
if (!ret && *temp < crit_temp)
*temp = tz->emul_temperature;
}
--
1.7.10.4
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