Sorry, I misunderstood your idea before. A new function is 
the best solution for this problem.

Regards,
Dinghao

"Dan Carpenter" <dan.carpen...@oracle.com>写道:
> On Thu, May 21, 2020 at 07:42:56PM +0800, dinghao....@zju.edu.cn wrote:
> > We need to make sure if pm_runtime_get_sync() is designed with
> > such behavior before modifying it.  
> > 
> > I received a response from Rafael when I commited a similar patch:
> > https://lkml.org/lkml/2020/5/20/1100
> > It seems that this behavior is intentional and needs to be kept.
> 
> Yes.  This is why I have said twice or three times to not change
> pm_runtime_get_sync() but instead to write a replacement.
> 
> A large percent of the callers are buggy.  The pm_runtime_get_sync() is
> a -4 on Rusty's API scale.
> http://sweng.the-davies.net/Home/rustys-api-design-manifesto
> One could argue that anything above a -4 is really a 2 if you read
> the implementation thouroughly enough...
> 
> regards,
> dan carpenter
> 
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