linux.git/drivers/thermal, branch v4.3-rc4

thermal: avoid division by zero in power allocator

2015-10-02T01:42:35+00:00

During boot I get a div by zero Oops regression starting in v4.3-rc3.

Signed-off-by: Andrea Arcangeli 
Reviewed-by: Javi Merino 
Cc: Zhang Rui 
Cc: Eduardo Valentin 
Cc: Daniel Kurtz 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

thermal: power_allocator: exit early if there are no cooling devices

2015-09-20T07:37:16+00:00

Don't waste cycles in the power allocator governor's throttle function
if there are no cooling devices and exit early.

This commit doesn't change any functionality, but should provide better
performance for the odd case of a thermal zone with trip points but
without cooling devices.

Cc: Zhang Rui 
Cc: Eduardo Valentin 
Reviewed-by: Daniel Kurtz 
Signed-off-by: Javi Merino 
Signed-off-by: Eduardo Valentin

thermal: power_allocator: don't require tzp to be present for the thermal zone

2015-09-14T14:43:15+00:00

Thermal zones created using thermal_zone_device_create() may not have
tzp.  As the governor gets its parameters from there, allocate it while
the governor is bound to the thermal zone so that it can operate in it.
In this case, tzp is freed when the thermal zone switches to another
governor.

Cc: Zhang Rui 
Cc: Eduardo Valentin 
Reviewed-by: Daniel Kurtz 
Signed-off-by: Javi Merino 
Signed-off-by: Eduardo Valentin

thermal: power_allocator: relax the requirement of two passive trip points

2015-09-14T14:41:45+00:00

The power allocator governor currently requires that the thermal zone
has at least two passive trip points.  If there aren't, the governor
refuses to bind to the thermal zone.

This commit relaxes that requirement.  Now the governor will bind to all
thermal zones regardless of how many trip points they have.

Cc: Zhang Rui 
Cc: Eduardo Valentin 
Reviewed-by: Daniel Kurtz 
Signed-off-by: Javi Merino 
Signed-off-by: Eduardo Valentin

thermal: power_allocator: relax the requirement of a sustainable_power in tzp

2015-09-14T14:40:51+00:00

The power allocator governor currently requires that a sustainable power
is passed as part of the thermal zone's thermal zone parameters.  If
that parameter is not provided, it doesn't register with the thermal
zone.

While this parameter is strongly recommended for optimal performance, it
doesn't need to be mandatory.  Relax the requirement and allow the
governor to bind to thermal zones that don't provide it by estimating it
from the cooling devices' power model.

Cc: Zhang Rui 
Cc: Eduardo Valentin 
Reviewed-by: Daniel Kurtz 
Signed-off-by: Javi Merino 
Signed-off-by: Eduardo Valentin

thermal: Add a function to get the minimum power

2015-09-14T14:39:46+00:00

The thermal core already has a function to get the maximum power of a
cooling device: power_actor_get_max_power().  Add a function to get the
minimum power of a cooling device.

Cc: Zhang Rui 
Cc: Eduardo Valentin 
Reviewed-by: Daniel Kurtz 
Signed-off-by: Javi Merino 
Signed-off-by: Eduardo Valentin

thermal: cpu_cooling: free power table on error or when unregistering

2015-09-14T03:34:05+00:00

The power table is not being freed on error from cpufreq_cooling
register or when unregistering.  Free it.

Fixes: c36cf0717631 ("thermal: cpu_cooling: implement the power cooling device API")
Cc: Zhang Rui 
Cc: Eduardo Valentin 
Signed-off-by: Javi Merino 
Signed-off-by: Eduardo Valentin

thermal: cpu_cooling: don't call kcalloc() under rcu_read_lock

2015-09-14T03:33:17+00:00

build_dyn_power_table() allocates the power table while holding
rcu_read_lock.  kcalloc using GFP_KERNEL may sleep, so it can't be
called in an RCU read-side path.

Move the rcu protection to the part of the function that really needs
it: the part that handles the dev_pm_opp pointer received from
dev_pm_opp_find_freq_ceil().  In the unlikely case that there is an OPP
added to the cpu while this function is running, return -EAGAIN.

Fixes: c36cf0717631 ("thermal: cpu_cooling: implement the power cooling device API")
Cc: Zhang Rui 
Cc: Eduardo Valentin 
Signed-off-by: Javi Merino 
Signed-off-by: Eduardo Valentin

thermal: db8500_cpufreq_cooling: Fix module autoload for OF platform driver

2015-09-14T03:26:19+00:00

This platform driver has a OF device ID table but the OF module
alias information is not created so module autoloading won't work.

Signed-off-by: Luis de Bethencourt 
Signed-off-by: Eduardo Valentin

thermal: ti-soc: Kconfig fix to avoid menu showing wrongly

2015-09-14T02:33:53+00:00

Move the dependencies to menu, so we avoid showing it wrongly.

Cc: Zhang Rui 
Cc: linux-pm@vger.kernel.org
Cc: linux-omap@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Eduardo Valentin