ASoC: hdac_hda: fix memleak with regmap not freed on remove

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@linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@gmail.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200617164144.17859-1-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/hdac_hda.c b/sound/soc/codecs/hdac_hda.c
index de003acb1951f3cc69856ebe9d044cfb130c2e0a..473efe9ef998a71de37cc47b7593fd9a6be91c52 100644 (file)
--- 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[] = {