From 934c93b8c193b62fc86256ea64aef65e9a7b4e9e Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Mon, 6 Jul 2015 09:46:17 +0200 Subject: [PATCH] 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 Reviewed-by: Mikko Perttunen Signed-off-by: Zhang Rui --- 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 9599465abeac..6a707789746b 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -498,6 +498,11 @@ 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; }