target/linux/mediatek/patches/0014-thermal-Add-comment-explaining-test-for-critical-tem.patch

   1 From 18f50eae474edc716b01959fad6898c8553b131c Mon Sep 17 00:00:00 2001
   2 From: Sascha Hauer <s.hauer@pengutronix.de>
   3 Date: Wed, 13 May 2015 10:52:33 +0200
   4 Subject: [PATCH 14/76] thermal: Add comment explaining test for critical
   5  temperature
   6
   7 The code testing if a temperature should be emulated or not is
   8 not obvious. Add a comment explaining why this test is done.
   9
  10 Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
  11 Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
  12 ---
  13  drivers/thermal/thermal_core.c |    5 +++++
  14  1 file changed, 5 insertions(+)
  15
  16 --- a/drivers/thermal/thermal_core.c
  17 +++ b/drivers/thermal/thermal_core.c
  18 @@ -438,6 +438,11 @@ int thermal_zone_get_temp(struct thermal
  19                         }
  20                 }
  21
  22 +               /*
  23 +                * Only allow emulating a temperature when the real temperature
  24 +                * is below the critical temperature so that the emulation code
  25 +                * cannot hide critical conditions.
  26 +                */
  27                 if (!ret && *temp < crit_temp)
  28                         *temp = tz->emul_temperature;
  29         }