ASoC: mediatek: fix double free in mt2701_afe_pcm_dev_probe()

The commit dfa3cbb8(ASoC: mediatek: modify MT2701 AFE driver to adapt mfd device)
leads to the following static checker warning:

	sound/soc/mediatek/mt2701/mt2701-afe-pcm.c:1535 mt2701_afe_pcm_dev_probe()
	error: double free of 'component'

This patch fixes that and adds a helper mt2701_afe_add_component() to setup
component.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 18 insertions, 14 deletions

diff --git a/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c b/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c
index 5bc4e00a4a29..d68b53f7cefe 100644
--- a/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c
+++ b/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c
@@ -1405,9 +1405,24 @@ static int mt2701_afe_runtime_resume(struct device *dev)
         return mt2701_afe_enable_clock(afe);
 }
 
-static int mt2701_afe_pcm_dev_probe(struct platform_device *pdev)
+static int mt2701_afe_add_component(struct mtk_base_afe *afe)
 {
         struct snd_soc_component *component;
+
+        component = kzalloc(sizeof(*component), GFP_KERNEL);
+        if (!component)
+                return -ENOMEM;
+
+        component->regmap = afe->regmap;
+
+        return snd_soc_add_component(afe->dev, component,
+                                     &mt2701_afe_pcm_dai_component,
+                                     mt2701_afe_pcm_dais,
+                                     ARRAY_SIZE(mt2701_afe_pcm_dais));
+}
+
+static int mt2701_afe_pcm_dev_probe(struct platform_device *pdev)
+{
         struct mtk_base_afe *afe;
         struct mt2701_afe_private *afe_priv;
         struct device *dev;
@@ -1477,12 +1492,6 @@ static int mt2701_afe_pcm_dev_probe(struct platform_device *pdev)
                         = &mt2701_i2s_data[i][I2S_IN];
         }
 
-        component = kzalloc(sizeof(*component), GFP_KERNEL);
-        if (!component)
-                return -ENOMEM;
-
-        component->regmap = afe->regmap;
-
         afe->mtk_afe_hardware = &mt2701_afe_hardware;
         afe->memif_fs = mt2701_memif_fs;
         afe->irq_fs = mt2701_irq_fs;
@@ -1495,7 +1504,7 @@ static int mt2701_afe_pcm_dev_probe(struct platform_device *pdev)
         ret = mt2701_init_clock(afe);
         if (ret) {
                 dev_err(dev, "init clock error\n");
-                goto err_init_clock;
+                return ret;
         }
 
         platform_set_drvdata(pdev, afe);
@@ -1514,10 +1523,7 @@ static int mt2701_afe_pcm_dev_probe(struct platform_device *pdev)
                 goto err_platform;
         }
 
-        ret = snd_soc_add_component(dev, component,
-                                    &mt2701_afe_pcm_dai_component,
-                                    mt2701_afe_pcm_dais,
-                                    ARRAY_SIZE(mt2701_afe_pcm_dais));
+        ret = mt2701_afe_add_component(afe);
         if (ret) {
                 dev_warn(dev, "err_dai_component\n");
                 goto err_dai_component;
@@ -1531,8 +1537,6 @@ err_platform:
         pm_runtime_put_sync(dev);
 err_pm_disable:
         pm_runtime_disable(dev);
-err_init_clock:
-        kfree(component);
 
         return ret;
 }