ASF GitHub Bot commented on MYNEWT-881:

vrahane commented on issue #718: MYNEWT-881 SensorAPI: LIS2DH12 set thresh cb 
URL: https://github.com/apache/mynewt-core/pull/718#issuecomment-365477855
   @rymanluk I have addressed the comments and I do agree with your comments, I 
was a bit confused about the unset API since there are different ways of taking 
care of things but what I have done in the above commits should be good enough 
considering we have to enable/disable specific interrupts in the sensors 
registers if all the interrupts are not disabled. Hence, hal_gpio_irq_release() 
can only be called if all the thresholds are not valid. Hope I am making sense. 
Please go through the PR once again. Thank you.

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> SensorAPI: Add sensor_unset_thresh() API and LIS2DH12 set threshold cb fix
> --------------------------------------------------------------------------
>                 Key: MYNEWT-881
>                 URL: https://issues.apache.org/jira/browse/MYNEWT-881
>             Project: Mynewt
>          Issue Type: Improvement
>      Security Level: Public(Viewable by anyone) 
>          Components: Drivers, Sensor Framework
>    Affects Versions: v1_3_0_rel
>         Environment: ruuvitag-revb2
>            Reporter: Vipul Rahane
>            Assignee: Vipul Rahane
>            Priority: Major
>              Labels: core
>             Fix For: v1_4_0_rel
> There are two issues for calling the lis2dh12_sensor_set_trigger_thresh() :
> 1. gpio irq was not being released before doing a re-initialization
>  2. srec was malloced and calling the function multiple times would have 
> malloced additional memory without freeing it.
> Solution:
>  1. Release the gpio irq
>  2. Remove the malloc and add a ptr for the sensor in each type trait so that 
> a sensor read could be performed in the irq handler.
> Also, sensor_unset_thresh() API was added to unset thresholds 
> triggers/interrupts.

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