> I'd say as a quick fix for stable check that card is not NULL in > dapm_widget_show_component(). And as a longterm fix get rid of > dapm_widget > file. Nobody should hopefully use it anymore with debugfs being > available as > the far better alternative. > > - Lars Well, that was my original approach while I realized problem is caused by de-referencing a null pointer to its member of 'widget' list. i.e. https://chromium-review.googlesource.com/#/c/331285/3/sound/soc/soc-dap m.c + if (WARN_ON(!codec->component.card)) + return 0; + Additional remark is that I was working on chromium-os v3.18 kernel, so that the interface and argument are sort of different than what I then cherry-pick'ed then sent, which was based on latest 4.5. Then I was stuck at here couple days keeping hunting root cause, Turned out I found that commit skipped probing dummy component. Long story short. -Harry _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
