> On Wed, Dec 30, 1998 at 04:16:54PM +0100, Mike Galbraith wrote:
> > after we have opened the dsp O_WRONLY and set it up for dma16. When we
> > close, we end up closing the wrong dmap because it is switched out from
> > underneath us in sb_audio_close() before close_dmap() is called. Later
> > attempts to open O_RDWR find dmap_in busy.
> > Tested with all of the sound goodies I have.. all seem happy.
> First time works great. Second time, I get this. I'm running 2.2.0pre3.
>
> root@terminus [~]: /usr/games/quake2
> Added packfile ./baseq2/pak0.pak (3307 files)
> Added packfile ./baseq2/pak4.pak (158 files)
> Added packfile ./baseq2/pak5.pak (495 files)
> Added packfile ./baseq2/pak6.pak (133 files)
> execing default.cfg
> execing config.cfg
> Console initialized.
>
> ------- sound initialization -------
> sound sampling rate: 11025
> Segmentation fault
Hi,
Looks like my fix was almost right ;-(wrong). Mikael Pettersson donated
the following, which works with everything I've tried. (quake free zone)
Maybe some other folks should test?
-Mike
--- linux-2.2.0-pre1-ac4/drivers/sound/sb_audio.c.orig Thu Dec 31 16:48:36 1998
+++ linux-2.2.0-pre1-ac4/drivers/sound/sb_audio.c Thu Dec 31 18:06:44 1998
@@ -92,8 +92,10 @@
{
sb_devc *devc = audio_devs[dev]->devc;
- /* if we did dma juggling put the right dmap in the right place */
- if(devc->fullduplex && audio_devs[dev]->dmap_out->dma != devc->dma8)
+ /* fix things if mmap turned off fullduplex */
+ if(devc->duplex
+ && !devc->fullduplex
+ && (devc->opened & OPEN_READ) && (devc->opened & OPEN_WRITE))
{
struct dma_buffparms *dmap_temp;
dmap_temp = audio_devs[dev]->dmap_out;
-
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