Re: [PATCH] ALSA: hda - Don't register a cb func if it is registered already

Dne 30. 09. 20 v 7:51 Hui Wang napsal(a):

If the caller of enable_callback_mst() passes a cb func, the callee function will malloc memory and link this cb func to the list unconditionally. This will introduce problem if caller is in the hda_codec_ops.init() since the init() will be repeatedly called in the codec rt_resume().

So far, the patch_hdmi.c and patch_ca0132.c call enable_callback_mst() in the hda_codec_ops.init().

Won't be better to handle this double invocation at the callback call time? I believe that some refcounting and pointing to one allocated callback structure for all instances is better.

Jaroslav