>  1. user does select() to wait for a frame to be ready.
>  2. select polls until it finds a frame that's done and return POLLIN
>  3. interrupt handler goes and unmark that frame as ready and start capturing
>     a new frame into that same buffer.

Wrong.  You might capture to *another* buffer.  But the driver must not
capture to the same buffer until it is requeued with QBUF.

  Gerd

-- 
#include </dev/tty>



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