v4l2 framework in a multiple thread environment

[m silverstri]

Hi,

I am writing a driver using v4l2 framework. I want to know does v4l2
framework make my driver thread-safe?
What if multiple threads try to
* open the driver
* enqueue/dequeue buffer
* run device_run
at the same time. Do I need to add mutex myself? Of all the hooks I
provide to v4l2  framework is already thread-safe?

Thank you.