From 6e6bc34f85702ea065a84477eec4a1401e759f9c Mon Sep 17 00:00:00 2001 From: =?utf8?q?Amadeusz=20S=C5=82awi=C5=84ski?= Date: Mon, 17 Jun 2019 13:36:42 +0200 Subject: [PATCH] ASoC: Intel: hdac_hdmi: Set ops to NULL on remove MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit [ Upstream commit 0f6ff78540bd1b4df1e0f17806b0ce2e1dff0d78 ] 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 Reviewed-by: Pierre-Louis Bossart Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- 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 6348724..0981966 100644 --- a/sound/soc/codecs/hdac_hdmi.c +++ b/sound/soc/codecs/hdac_hdmi.c @@ -1854,6 +1854,12 @@ 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); } -- 2.7.4