Latest -current panic in uaudio_detach() / bus_dmamem_free()
Alexander Kabaev
kabaev at gmail.com
Mon Jun 23 02:46:42 UTC 2014
On Mon, 23 Jun 2014 06:04:20 +0400
Andrey Chernov <ache at freebsd.org> wrote:
> Always happens at shutdown after all buffers are synced, see
> screenshot: http://i.imgur.com/8WXTMPj.png
>
> --
> http://ache.vniz.net/
Hi Andrey,
there's not to much to go on from the screenshoot alone and one would
expect more details on the crash from people with your experience :)
Please provide us with the information on the actual audio hardware
you are using, preferably in form of a dmesg output. This revision is
your culpit:
http://svnweb.freebsd.org/changeset/base/267581 and I have strong
suspicion that restoring the NULL check on dmatag in the chunk below
will cure your crash.
-- Modified: head/sys/dev/sound/pcm/buffer.c
==============================================================================
--- head/sys/dev/sound/pcm/buffer.c Tue Jun 17 14:47:49
2014 (r267580) +++ head/sys/dev/sound/pcm/buffer.c Tue
Jun 17 16:07:57 2014 (r267581) @@ -139,10 +139,9 @@
sndbuf_free(struct snd_dbuf *b)
if (b->buf) {
if (b->flags & SNDBUF_F_MANAGED) {
- if (b->dmamap)
+ if (b->buf_addr)
bus_dmamap_unload(b->dmatag,
b->dmamap);
- if (b->dmatag)
- bus_dmamem_free(b->dmatag, b->buf,
b->dmamap);
+ bus_dmamem_free(b->dmatag, b->buf, b->dmamap);
} else
free(b->buf, M_DEVBUF);
}
--
Alexander Kabaev
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