[alsa-devel] [PATCH] ASoC: OMAP machines: Fix kernel crash due to changes in core

[Mark Brown]

On Fri, Oct 07, 2011 at 10:06:46AM +0300, Peter Ujfalusi wrote:
> Calling soc_dapm_sync() after adding DAPM widgets/routes
> will lead to kernel crash caused by unitialized
> widget->power_check callback (NULL pointer dereference).

> Call snd_soc_dapm_new_widgets(dapm); instead of soc_dapm_sync
> which will initialize the widgets, and will call the
> dapm_power_widgets (soc_dapm_sync is a wrapper for
> dapm_power_widgets).

No, there should be no need for either callback in individual drivers
unless they're doing something very specialist.  This will have been the
case for a while now.