From: Hans de Goede Date: Sat, 21 Mar 2015 14:02:55 +0000 (+0100) Subject: thermal: Do not log an error if thermal_zone_get_temp returns -EAGAIN X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=7e497a7375fe5d5c5d751a71d006f4fd515bbcd8;p=deliverable%2Flinux.git thermal: Do not log an error if thermal_zone_get_temp returns -EAGAIN Some temperature sensors only get updated every few seconds and while waiting for the first irq reporting a (new) temperature to happen there get_temp operand will return -EAGAIN as it does not have any data to report yet. Not logging an error in this case avoids messages like these from showing up in dmesg on affected systems: [ 1.219353] thermal thermal_zone0: failed to read out thermal zone 0 [ 2.015433] thermal thermal_zone0: failed to read out thermal zone 0 [ 2.416737] thermal thermal_zone0: failed to read out thermal zone 0 Reviewed-by: Dmitry Torokhov Signed-off-by: Hans de Goede Signed-off-by: Eduardo Valentin --- diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 174d3bcf8bd7..4108db7e10c1 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -458,8 +458,10 @@ static void update_temperature(struct thermal_zone_device *tz) ret = thermal_zone_get_temp(tz, &temp); if (ret) { - dev_warn(&tz->device, "failed to read out thermal zone %d\n", - tz->id); + if (ret != -EAGAIN) + dev_warn(&tz->device, + "failed to read out thermal zone (%d)\n", + ret); return; }