On Thu, Mar 17, 2016 at 10:38:36AM +0000, Pan, Harry wrote: > Allow me to explain more detail that I saw during debug; since the > commit 6e78108bda78 (ASoC: core: Don't probe the component which is > dummy), an exception has been made that dummy component won't be probed, > thus the 'card' passed into soc_probe_component() would not be assigned > to this component. In the other hand, the component struct is initially > created in snd_soc_register_platform() by kzalloc() of platform struct, > its 'card' pointer is remaining an NULL pointer even the widget node > being read. > Perhaps another option is to refine soc_probe_component(), which I have > not dive in. Another approach might be to create a separate dummy component for each card rather than trying to reuse the same one for all of them (which was what the commit you mention was doing) - that way we don't need to worry about it getting added to multiple cards which was the original problem that was being looked at here.
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