lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 16 Mar 2016 00:09:36 +0000 From: "Pandruvada, Srinivas" <srinivas.pandruvada@...el.com> To: "edubezval@...il.com" <edubezval@...il.com>, "Zhang, Rui" <rui.zhang@...el.com> CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org> Subject: Re: [PATCHv2 2/3] thermal: rework core to allow emul_temp to be treated as regular temp On Thu, 2015-12-17 at 11:13 -0800, Eduardo Valentin wrote: > Change the way we handle emul_temp. This is to allow > emul_temp to be used as input to exercise thermal core > properly. Now, even if .get_temp is not available, > the emul_temp can be used to emulate temperature. > > Cc: Zhang Rui <rui.zhang@...el.com> > Cc: linux-pm@...r.kernel.org > Cc: linux-kernel@...r.kernel.org > Signed-off-by: Eduardo Valentin <edubezval@...il.com> Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com> > --- > V1-> V2: fixed real_temp initial value. > --- > drivers/thermal/thermal_core.c | 33 ++++++++++++++++++++---------- > --- > 1 file changed, 20 insertions(+), 13 deletions(-) > > diff --git a/drivers/thermal/thermal_core.c > b/drivers/thermal/thermal_core.c > index 8fa82c0..a229c84 100644 > --- a/drivers/thermal/thermal_core.c > +++ b/drivers/thermal/thermal_core.c > @@ -472,18 +472,25 @@ static void handle_thermal_trip(struct > thermal_zone_device *tz, int trip) > int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp) > { > int ret = -EINVAL; > - int count; > - int crit_temp = INT_MAX; > - enum thermal_trip_type type; > + int crit_temp = INT_MAX, real_temp = INT_MIN; > > - if (!tz || IS_ERR(tz) || !tz->ops->get_temp) > - goto exit; > + if (!tz || IS_ERR(tz)) > + return ret; > > mutex_lock(&tz->lock); > > - ret = tz->ops->get_temp(tz, temp); > + /* Allow emulation if .get_temp is still not available */ > + if (tz->ops->get_temp) { > + ret = tz->ops->get_temp(tz, temp); > + if (!ret) > + real_temp = *temp; > + } > > if (IS_ENABLED(CONFIG_THERMAL_EMULATION) && tz- > >emul_temperature) { > + enum thermal_trip_type type; > + int count; > + > + ret = 0; > for (count = 0; count < tz->trips; count++) { > ret = tz->ops->get_trip_type(tz, count, > &type); > if (!ret && type == THERMAL_TRIP_CRITICAL) { > @@ -498,17 +505,17 @@ int thermal_zone_get_temp(struct > thermal_zone_device *tz, int *temp) > * is below the critical temperature so that the > emulation code > * cannot hide critical conditions. > */ > - if (!ret && *temp < crit_temp) > + if (!ret && real_temp < crit_temp) > *temp = tz->emul_temperature; > } > > mutex_unlock(&tz->lock); > -exit: > + > return ret; > } > EXPORT_SYMBOL_GPL(thermal_zone_get_temp); > > -static void update_temperature(struct thermal_zone_device *tz) > +static int update_temperature(struct thermal_zone_device *tz) > { > int temp, ret; > > @@ -518,7 +525,7 @@ static void update_temperature(struct > thermal_zone_device *tz) > dev_warn(&tz->device, > "failed to read out thermal zone > (%d)\n", > ret); > - return; > + return ret; > } > > mutex_lock(&tz->lock); > @@ -529,17 +536,17 @@ static void update_temperature(struct > thermal_zone_device *tz) > trace_thermal_temperature(tz); > dev_dbg(&tz->device, "last_temperature=%d, > current_temperature=%d\n", > tz->last_temperature, tz- > >temperature); > + > + return 0; > } > > void thermal_zone_device_update(struct thermal_zone_device *tz) > { > int count; > > - if (!tz->ops->get_temp) > + if (update_temperature(tz)) > return; > > - update_temperature(tz); > - > for (count = 0; count < tz->trips; count++) > handle_thermal_trip(tz, count); >
Powered by blists - more mailing lists