picking the first patch

Hello team , Sorry for a vague question. So far I have spent a lot of time dreaming to be a kernel hacker without doing much , but I realised its geting too late and now I want to pick my first patch to work, I have decided to address the TODO at drivers/staging/grebus/TODO : " * Make pwm.c use the struct pwm_ops::apply instead of ::config, ::set_polarity, 4 ::enable and ::disable." To make sure this is a first good patch , I verified that there is traction for this driver recently. But I am not sure, let's say I change the code , how to test it ? Any thoughts on whether I should just do a checkpatch.pl change as my first patch ? Thanks Vardhan