ALSA: hda: Fix forget to free resource in error handling code path in hda_codec_driver_probe

When hda_codec_driver_probe meet error and return failure, we need to free resource with patch_ops.free, or we will get resource leak.

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Changes v1-v2:
1: Fix calling patch_ops.free after module_put, reported by Takashi Iwai.

Hi! Takashi Iwai
Because the only one calling site of patch_ops.free is in hda_codec_driver_remove, and if hda_codec_driver_probe return failure, we will no chance to call the hda_codec_driver_remove, so I think we don't need to care below case:
"Or, for safety, we may put an internal flag to indicate that the codec
free got already called, and check it at before calling patch_ops.free, too."

Thanks!

 sound/pci/hda/hda_bind.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

index 6efadbf..d361bb7 100644
@@ -100,7 +100,7 @@ static int hda_codec_driver_probe(struct device *dev)
 	if (patch) {
 		err = patch(codec);
 		if (err < 0)
-			goto error_module;
+			goto error_module_put;
 	}
 
 	err = snd_hda_codec_build_pcms(codec);

@@ -120,6 +120,9 @@ static int hda_codec_driver_probe(struct device *dev)
 	return 0;
 
  error_module:
+	if (codec->patch_ops.free)
+		codec->patch_ops.free(codec);
+ error_module_put:
 	module_put(owner);
 
  error:

1.8.5.6.2.g3d8a54e.dirty

Fair enough, applied now.

I found patch_ca0132.c still misses the free at the error path in its probe function, so I'll fix it.

thanks,

Takashi