On 23.06.2014 6:46, Alexander Kabaev wrote: > Please provide us with the information on the actual audio hardware > you are using, preferably in form of a dmesg output.
uaudio0: <vendor 0x046d product 0x0990, class 239/2, rev 2.00/0.05, addr 7> on usbus3 uaudio0: No playback. uaudio0: Record: 16000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer. uaudio0: No MIDI sequencer. pcm7: <USB audio> on uaudio0 uaudio0: No HID volume keys found. Thanx, after backing out the patch below this panic is gone. Probably even additional b->dmatag NULL check is needed for bus_dmamap_unload() too. > 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); > } > -- http://ache.vniz.net/
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