[alsa-devel] Driver code with mpc5200 pointer problem.

Jaroslav Kysela perex at perex.cz
Tue Apr 28 12:15:25 CEST 2009

On Tue, 28 Apr 2009, Takashi Iwai wrote:

> Well, I think it'd be better, at this moment for 2.6.30, to allow
> problematic drivers to skip the jiffies check.  Adding the fundamental
> change at this late stage is bad, especially if the change wasn't
> tested much by many others and has an influence on user-side API.
> So, as I proposed, we can simply add the pcm info check, and add
> BATCH flag to needed drivers.  Of course, it still requires some
> more testing, but basically it'll take back to the old behavior and
> should be safer.
> Meanwhile, applying the delay account patch now for 2.6.31 should be
> good (ealier is better).  It doesn't conflict with the info flag
> check, so we can work parallel.

Could we just add the runtime->delay variable without touching other code 
(pcm status), to correct the jiffies based check now? It seems like a good 
step forward to me and the lowlevel drivers will be more prepared for next 
PCM midlevel code changes.


Jaroslav Kysela <perex at perex.cz>
Linux Kernel Sound Maintainer
ALSA Project, Red Hat, Inc.

More information about the Alsa-devel mailing list