[PATCH] ALSA: hda: fix possible memory leak in azx_codec_configure()

[Yang Yingliang]

If the codec device is registered, after calling snd_hdac_device_unregister(),
codec has already been removed from chip bus, it should call put_device() to
give up reference to free codec and device name.

Fixes: c0f1886de7e1 ("ALSA: hda: intel: Allow repeatedly probing on codec configuration errors")
Signed-off-by: Yang Yingliang <yangyingliang at huawei.com>
---
 sound/pci/hda/hda_controller.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c
index 0ff286b7b66b..f6a73ce300a4 100644
--- a/sound/pci/hda/hda_controller.c
+++ b/sound/pci/hda/hda_controller.c
@@ -1257,8 +1257,11 @@ int azx_codec_configure(struct azx *chip)
 		/* unregister failed codecs if any codec has been probed */
 		list_for_each_codec_safe(codec, next, &chip->bus) {
 			if (!codec->configured) {
+				bool is_registered = device_is_registered(&codec->core.dev);
 				codec_err(codec, "Unable to configure, disabling\n");
 				snd_hdac_device_unregister(&codec->core);
+				if (is_registered)
+					put_device(&codec->core.dev);
 			}
 		}
 	}
-- 
2.25.1