linux-kernel - [PATCH 5.7 016/166] ASoC: hdac_hda: fix memleak with regmap not freed on remove

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Date:   Tue, 14 Jul 2020 20:43:01 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Daniel Baluta <daniel.baluta@...il.com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Rander Wang <rander.wang@...ux.intel.com>,
        Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.7 016/166] ASoC: hdac_hda: fix memleak with regmap not freed on remove

From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>

[ Upstream commit a94eaccefea1186947c5c5451fcae2245dd7e714 ]

kmemleak throws error reports on module load/unload tests, add
snd_hdac_regmap_exit() in .remove().

While we are at it, also fix the error handling flow in .probe() to
use snd_hdac_regmap_exit() if needed.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@...il.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@...ux.intel.com>
Reviewed-by: Rander Wang <rander.wang@...ux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
Link: https://lore.kernel.org/r/20200617164144.17859-1-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/codecs/hdac_hda.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/sound/soc/codecs/hdac_hda.c b/sound/soc/codecs/hdac_hda.c
index de003acb1951f..473efe9ef998a 100644
--- a/sound/soc/codecs/hdac_hda.c
+++ b/sound/soc/codecs/hdac_hda.c
@@ -441,13 +441,13 @@ static int hdac_hda_codec_probe(struct snd_soc_component *component)
 	ret = snd_hda_codec_set_name(hcodec, hcodec->preset->name);
 	if (ret < 0) {
 		dev_err(&hdev->dev, "name failed %s\n", hcodec->preset->name);
-		goto error;
+		goto error_pm;
 	}
 
 	ret = snd_hdac_regmap_init(&hcodec->core);
 	if (ret < 0) {
 		dev_err(&hdev->dev, "regmap init failed\n");
-		goto error;
+		goto error_pm;
 	}
 
 	patch = (hda_codec_patch_t)hcodec->preset->driver_data;
@@ -455,7 +455,7 @@ static int hdac_hda_codec_probe(struct snd_soc_component *component)
 		ret = patch(hcodec);
 		if (ret < 0) {
 			dev_err(&hdev->dev, "patch failed %d\n", ret);
-			goto error;
+			goto error_regmap;
 		}
 	} else {
 		dev_dbg(&hdev->dev, "no patch file found\n");
@@ -467,7 +467,7 @@ static int hdac_hda_codec_probe(struct snd_soc_component *component)
 	ret = snd_hda_codec_parse_pcms(hcodec);
 	if (ret < 0) {
 		dev_err(&hdev->dev, "unable to map pcms to dai %d\n", ret);
-		goto error;
+		goto error_regmap;
 	}
 
 	/* HDMI controls need to be created in machine drivers */
@@ -476,7 +476,7 @@ static int hdac_hda_codec_probe(struct snd_soc_component *component)
 		if (ret < 0) {
 			dev_err(&hdev->dev, "unable to create controls %d\n",
 				ret);
-			goto error;
+			goto error_regmap;
 		}
 	}
 
@@ -496,7 +496,9 @@ static int hdac_hda_codec_probe(struct snd_soc_component *component)
 
 	return 0;
 
-error:
+error_regmap:
+	snd_hdac_regmap_exit(hdev);
+error_pm:
 	pm_runtime_put(&hdev->dev);
 error_no_pm:
 	snd_hdac_ext_bus_link_put(hdev->bus, hlink);
@@ -518,6 +520,8 @@ static void hdac_hda_codec_remove(struct snd_soc_component *component)
 
 	pm_runtime_disable(&hdev->dev);
 	snd_hdac_ext_bus_link_put(hdev->bus, hlink);
+
+	snd_hdac_regmap_exit(hdev);
 }
 
 static const struct snd_soc_dapm_route hdac_hda_dapm_routes[] = {
-- 
2.25.1