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Message-Id: <1432128046-12921-6-git-send-email-s.hauer@pengutronix.de>
Date: Wed, 20 May 2015 15:20:35 +0200
From: Sascha Hauer <s.hauer@...gutronix.de>
To: linux-pm@...r.kernel.org
Cc: Zhang Rui <rui.zhang@...el.com>,
Eduardo Valentin <edubezval@...il.com>,
linux-kernel@...r.kernel.org,
Stephen Warren <swarren@...dotorg.org>,
Mikko Perttunen <mikko.perttunen@...si.fi>,
kernel@...gutronix.de, linux-mediatek@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org,
Brian Norris <computersforpeace@...il.com>,
Sascha Hauer <s.hauer@...gutronix.de>
Subject: [PATCH 05/16] 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@...gutronix.de>
Reviewed-by: Mikko Perttunen <mperttunen@...dia.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;
}
--
2.1.4
--
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