Commit e3145dfb authored by Jean Delvare's avatar Jean Delvare Committed by Takashi Iwai

ALSA: ASoC: Fix cs4270 error path

The error path in cs4270_probe/cs4270_remove is pretty broken:
* If cs4270_probe fails, codec is leaked.
* If snd_soc_register_card fails, cs4270_i2c_driver stays registered.
* If I2C support is enabled but no I2C device is found, i2c_del_driver
  is never called (neither in cs4270_probe nor in cs4270_remove.

Fix all 3 problems by implementing a clean error path in cs4270_probe
and jumping to its labels as needed.
Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
Acked-by: default avatarTimur Tabi <timur@freescale.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 9778e9a0
...@@ -681,7 +681,7 @@ static int cs4270_probe(struct platform_device *pdev) ...@@ -681,7 +681,7 @@ static int cs4270_probe(struct platform_device *pdev)
ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
if (ret < 0) { if (ret < 0) {
printk(KERN_ERR "cs4270: failed to create PCMs\n"); printk(KERN_ERR "cs4270: failed to create PCMs\n");
return ret; goto error_free_codec;
} }
#ifdef USE_I2C #ifdef USE_I2C
...@@ -690,8 +690,7 @@ static int cs4270_probe(struct platform_device *pdev) ...@@ -690,8 +690,7 @@ static int cs4270_probe(struct platform_device *pdev)
ret = i2c_add_driver(&cs4270_i2c_driver); ret = i2c_add_driver(&cs4270_i2c_driver);
if (ret) { if (ret) {
printk(KERN_ERR "cs4270: failed to attach driver"); printk(KERN_ERR "cs4270: failed to attach driver");
snd_soc_free_pcms(socdev); goto error_free_pcms;
return ret;
} }
/* Did we find a CS4270 on the I2C bus? */ /* Did we find a CS4270 on the I2C bus? */
...@@ -713,10 +712,23 @@ static int cs4270_probe(struct platform_device *pdev) ...@@ -713,10 +712,23 @@ static int cs4270_probe(struct platform_device *pdev)
ret = snd_soc_register_card(socdev); ret = snd_soc_register_card(socdev);
if (ret < 0) { if (ret < 0) {
printk(KERN_ERR "cs4270: failed to register card\n"); printk(KERN_ERR "cs4270: failed to register card\n");
snd_soc_free_pcms(socdev); goto error_del_driver;
return ret;
} }
return 0;
error_del_driver:
#ifdef USE_I2C
i2c_del_driver(&cs4270_i2c_driver);
error_free_pcms:
#endif
snd_soc_free_pcms(socdev);
error_free_codec:
kfree(socdev->codec);
socdev->codec = NULL;
return ret; return ret;
} }
...@@ -727,8 +739,7 @@ static int cs4270_remove(struct platform_device *pdev) ...@@ -727,8 +739,7 @@ static int cs4270_remove(struct platform_device *pdev)
snd_soc_free_pcms(socdev); snd_soc_free_pcms(socdev);
#ifdef USE_I2C #ifdef USE_I2C
if (socdev->codec->control_data) i2c_del_driver(&cs4270_i2c_driver);
i2c_del_driver(&cs4270_i2c_driver);
#endif #endif
kfree(socdev->codec); kfree(socdev->codec);
......
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