From mboxrd@z Thu Jan  1 00:00:00 1970
From: Xuebing Wang <xbing6@gmail.com>
Subject: Can not rmmod snd_hda_codec_hdmi
Date: Tue, 23 Dec 2014 19:07:52 +0800
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Cc: "; Takashi Iwai" <tiwai@suse.de>, Anssi Hannula <anssi.hannula@iki.fi>, ";
 Libin Yang" <libin.yang@intel.com>, ";
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 Mengdong Lin" <mengdong.lin@intel.com>
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Hi community,

I am trying to implement the function of streaming SACD music over HDMI,
my PC is Intel Haswell based CPU (Intel i7 4770).

When I am trying to 'rmmod snd_hda_codec_hdmi', I get the prompt that
this module is in use (detailed message as below) 
rmmod: ERROR: Module snd_hda_codec_hdmi is in use

Is it possible that workqueue [hd-audio] is using this kernel module
(snd_hda_codec_hdmi)?

Can I use rmmod / insmod as the way to debug this module?

Thanks.
Xuebing Wang