[PATCH 1/9] ALSA: hda: Do not unset preset when cleaning up codec

[Takashi Iwai]

On Wed, 06 Jul 2022 14:02:22 +0200,
Cezary Rojewski wrote:
> 
> snd_hda_codec_cleanup_for_unbind() unsets preset what interferes with
> module unloading and triggers null-ptr-deref. Preset is assigned only
> once, during device/driver matching whereas module reload and unload
> follow completely different path and may occur several times during
> runtime.

Hm, the driver reload/unload does unbind.  Keeping this field mean to
leave the pointer to the possibly freed object, no?

And if it's not cleared, where is this field cleared instead?


thanks,

Takashi