[alsa-devel] snd_pcm_hw_params_free() immediately after snd_pcm_hw_params() ???

[Takashi Iwai]

At Sun, 24 Jan 2010 11:30:04 +0800,
Raymond Yau wrote:
> 
> 2010/1/21 Clemens Ladisch <clemens at ladisch.de>
> 
> > Raymond Yau wrote:
> > > Is there any flags in substream which can indicate snd_xxx_hw_params()
> > was
> > > called at first time since snd_xxx_hw_params() were called many times
> > > during OSS emulation (probing the supported rates , channels , .... ) ?
> >
> > There is no such flag.  It is the responsibility of the driver to track
> > the resources it has allocated.
> >
> > If a resource does not depend on the hardware parameters, it might be
> > a better idea to allocate/free it in the open/close callbacks.
> >
> >
> > Best regards,
> > Clemens
> >
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=497739
> 
> Apr 26 11:20:11 localhost kernel: vortex_adb_addroutes: unending route! 0x40
> Apr 26 11:20:11 localhost kernel: vortex_adb_addroutes: unending route! 0x2060
> Apr 26 11:20:11 localhost kernel: vortex_adb_addroutes: unending route! 0x3641
> Apr 26 11:20:11 localhost kernel: vortex_adb_addroutes: unending route! 0x2101
> Apr 26 11:20:11 localhost kernel: vortex_adb_delroutes: route not found! 0x3641
> Apr 26 11:20:11 localhost kernel: vortex_adb_delroutes: route not found! 0x2101
> Apr 26 11:20:11 localhost kernel: mix ALARM 0
> Apr 26 11:20:11 localhost kernel: vortex_adb_delroutes: route not found! 0x3593
> Apr 26 11:20:11 localhost kernel: mix ALARM 0
> Apr 26 11:20:11 localhost kernel: Vortex: vortex_fifo_setadbctrl fail
> Apr 26 11:20:11 localhost kernel: vortex_adb_addroutes: unending route! 0x3642
> Apr 26 11:20:11 localhost kernel: vortex_adb_addroutes: unending route! 0x3743
> Apr 26 11:20:11 localhost kernel: vortex_adb_addroutes: unending route! 0x2201
> Apr 26 11:20:11 localhost kernel: Vortex: vortex_fifo_setadbctrl fail
> 
> 
> did the suspend/resume cycle call snd_xxx_hw_params() or snd_xxx_hw_free()
> when the driver did not support suspend/resume ?

No.  It's all driver's responsibility.


Takashi