22 Nov
2023
22 Nov
'23
1:46 p.m.
This patch adds the jd_mutex to protect the jack detection control flow. And only the headset type could check the button status.
What's the protection here for - as far as I can see the mutex is only taken in the jack detection work function which should only ever have one copy running at once by virtue of being a single work function?
In the rt5645_sys_resume function, the driver calls rt5645_jack_detect_work function directly. It is possible that the work and rt5645_sys_resume both call rt5645_jack_detect_work function. Therefore, we need the mutex to protect.