I am pretty sure the bug is real, but the patch may be wrong, please review.
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.
Signed-off-by: Oleg Nesterov <[email protected]>
--- 6.19/drivers/media/video/video-buf.c~v4l_lockup 2006-11-17 19:42:25.000000000 +0300
+++ 6.19/drivers/media/video/video-buf.c 2007-01-23 19:44:19.000000000 +0300
@@ -700,6 +700,7 @@ videobuf_qbuf(struct videobuf_queue *q,
goto done;
}
if (buf->state == STATE_QUEUED ||
+ buf->state == STATE_PREPARED ||
buf->state == STATE_ACTIVE) {
dprintk(1,"qbuf: buffer is already queued or active.\n");
goto done;
-
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