releases/5.1.6/alsa-hda-fix-unregister-device-twice-on-asoc-driver.patch

From 561708574711cb9515faefe3c9c4ca754540f9c3 Mon Sep 17 00:00:00 2001
From: Bard liao <yung-chuan.liao@linux.intel.com>
Date: Sun, 28 Apr 2019 04:53:39 +0800
Subject: ALSA: hda: fix unregister device twice on ASoC driver

[ Upstream commit 4d95c51776b2edb4d4ebcea00b6e5a1fe538ce66 ]

snd_hda_codec_device_new() is used by both legacy HDA and ASoC
driver. However, we will call snd_hdac_device_unregister() in
snd_hdac_ext_bus_device_remove() for ASoC device. This patch uses
the type flag in hdac_device struct to determine is it a ASoC device
or legacy HDA device and call snd_hdac_device_unregister() in
snd_hda_codec_dev_free() only if it is a legacy HDA device.

Signed-off-by: Bard liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/pci/hda/hda_codec.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 701a69d856f5f..b20eb7fc83eb2 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -832,7 +832,13 @@ static int snd_hda_codec_dev_free(struct snd_device *device)
 	struct hda_codec *codec = device->device_data;
 
 	codec->in_freeing = 1;
-	snd_hdac_device_unregister(&codec->core);
+	/*
+	 * snd_hda_codec_device_new() is used by legacy HDA and ASoC driver.
+	 * We can't unregister ASoC device since it will be unregistered in
+	 * snd_hdac_ext_bus_device_remove().
+	 */
+	if (codec->core.type == HDA_DEV_LEGACY)
+		snd_hdac_device_unregister(&codec->core);
 	codec_display_power(codec, false);
 	put_device(hda_codec_dev(codec));
 	return 0;
-- 
2.20.1