Re: soc-camera : sh_mobile_ceu_camera race on free_buffer ?
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Hi, I am writing a soc camera driver, and I use sh_mobile_ceu_camera as an example. But I don't understand how buffer are handled when the application is doing a streamoff : streamoff will call videobuf_streamoff and then videobuf_queue_cancel. videobuf_queue_cancel will call free_buffer. But we didn't do stop_capture, so as far I understand the controller is still writing data in memory. What prevent us to free the buffer we are writing. Why doesn't we do a stop_capture before videobuf_streamoff ? I saw that pxa_camera use videobuf_waiton, before freeing the buffer. That seem more safe, but that mean we need to wait that controller finish to write all the pending buffer. Matthieu -- video4linux-list mailing list Unsubscribe mailto:video4linux-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/video4linux-list
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