>> The kfree() function was called in one case by the
>> acpi_i2c_space_handler() function during error handling
>> even if the passed variable "client" contained a null pointer.
> 
> This is OK. kfree() is known to be NULL-tolerant and we rely on it in
> various places to keep the code simpler.

I would appreciate if an unnecessary function call can be avoided here
so that the affected exception handling can become also a bit more efficient.

Regards,
Markus
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