[PATCH 12/14] ASoC: Intel: hdac_hdmi: Set ops to NULL on remove

[Amadeusz Sławiński]

When we unload Skylake driver we may end up calling
hdac_component_master_unbind(), it uses acomp->audio_ops, which we set
in hdmi_codec_probe(), so we need to set it to NULL in hdmi_codec_remove(),
otherwise we will dereference no longer existing pointer.

Signed-off-by: Amadeusz Sławiński <amadeuszx.slawin...@linux.intel.com>
---
 sound/soc/codecs/hdac_hdmi.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c
index 660e0587f399..da3835b703f5 100644
--- a/sound/soc/codecs/hdac_hdmi.c
+++ b/sound/soc/codecs/hdac_hdmi.c
@@ -1867,6 +1867,12 @@ static void hdmi_codec_remove(struct snd_soc_component 
*component)
 {
        struct hdac_hdmi_priv *hdmi = snd_soc_component_get_drvdata(component);
        struct hdac_device *hdev = hdmi->hdev;
+       int ret;
+
+       ret = snd_hdac_acomp_register_notifier(hdev->bus, NULL);
+       if (ret < 0)
+               dev_err(&hdev->dev, "notifier unregister failed: err: %d\n",
+                               ret);
 
        pm_runtime_disable(&hdev->dev);
 }
-- 
2.17.1