Re: [PATCH] iio: accel: kxcjk-1013: reject duplicate event disable

[Jonathan Cameron <jic23@kernel.org>]

On Sat, 26 Sep 2026 14:48:27 +0800 (CST)
"jiale yao" <19888972804@163.com> wrote:

> At 2026-09-26 08:49:42, "Jonathan Cameron" <jic23@kernel.org> wrote:
> >On Fri, 25 Sep 2026 22:38:07 +0800 (CST)
> >"jiale yao" <19888972804@163.com> wrote:
> >  
> >> At 2026-09-25 22:17:19, "Andy Shevchenko" <andriy.shevchenko@intel.com> wrote:  
> >> >On Fri, Sep 25, 2026 at 10:09:43PM +0800, Jiale Yao wrote:    
> >> >> The IIO core does not filter duplicate writes to the event enable
> >> >> attribute. kxcjk1013_write_event_config() already ignores repeated
> >> >> enable requests, but a repeated disable request still calls
> >> >> kxcjk1013_set_power_state(data, false), dropping a runtime PM reference
> >> >> that was not acquired for this request. This can underflow the runtime
> >> >> PM usage count and trigger a "Runtime PM usage count underflow" warning.
> >> >> 
> >> >> Return early when the requested state already matches ev_enable_state.    
> >> >
> >> >Sounds like a bug that needs to be fixed and hence Fixes tag to be applied.    
> >> Sure, I'll add the Fixes tag in v2, 24h later,  for any other comments before sending it.  
> >For a simple request for a fixes tag, I'm also fine with you just
> >replying with that tag.  b4 will pick it up (though technically in the
> >wrong place so I'll massage things whilst applying)  
> Thanks.
> Fixes: b4b491c0832e ("iio: accel: kxcjk-1013: Support thresholds")
Applied to the fixes-togreg branch of iio.git

Thanks,

Jonathan
> >
> >Fix looks good to me.
> >
> >Jonathan
> >  
> >> >
> >> >-- 
> >> >With Best Regards,
> >> >Andy Shevchenko
> >> >