ALSA: hda - Fix registration of beep input device

The beep input device is registered via input_register_device(), but
this is called in snd_hda_attach_beep_device() where the sound devices
aren't registered yet.  This leads to the binding to non-existing
object, thus results in failure.  And, even if the binding worked
(against the PCI object), it's still racy; the input device appears
before the sound objects.

For fixing this, register the input device properly at dev_register
ops of the codec object it's bound with.  Also, call
snd_hda_detach_beep_device() at dev_disconnection so that it's
detached at the right timing.  As a bonus, since it's called in the
codec's ops, we can get rid of the further call from the other codec
drivers.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 7 insertions, 1 deletions

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 6db2dbc..4c20277 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -1379,14 +1379,19 @@ static unsigned int hda_set_power_state(struct hda_codec *codec,
 static int snd_hda_codec_dev_register(struct snd_device *device)
 {
 	struct hda_codec *codec = device->device_data;
+	int err = device_add(&codec->dev);
 
-	return device_add(&codec->dev);
+	if (err < 0)
+		return err;
+	snd_hda_register_beep_device(codec);
+	return 0;
 }
 
 static int snd_hda_codec_dev_disconnect(struct snd_device *device)
 {
 	struct hda_codec *codec = device->device_data;
 
+	snd_hda_detach_beep_device(codec);
 	device_del(&codec->dev);
 	return 0;
 }
@@ -2692,6 +2697,7 @@ int snd_hda_codec_reset(struct hda_codec *codec)
 				  bus->pcm_dev_bits);
 		}
 	}
+	snd_hda_detach_beep_device(codec);
 	if (codec->patch_ops.free)
 		codec->patch_ops.free(codec);
 	memset(&codec->patch_ops, 0, sizeof(codec->patch_ops));