[patch 05/21] V4L: buf_qbuf: fix videobuf_queue->stream corruption and lockup

-stable review patch. If anyone has any objections, please let us know. -- We are doing ->buf_prepare(buf) before adding buf to q->stream list. This means that videobuf_qbuf() should not try to re-add a STATE_PREPARED buffer. (cherry picked from commit

[patch 05/21] V4L: buf_qbuf: fix videobuf_queue-stream corruption and lockup

-stable review patch. If anyone has any objections, please let us know. -- We are doing -buf_prepare(buf) before adding buf to q-stream list. This means that videobuf_qbuf() should not try to re-add a STATE_PREPARED buffer. (cherry picked from commit