ALSA: firewire-motu: destroy stream data surely at failure of card initialization

commit dbd7396b upstream.

When failing sound card registration after initializing stream data, this
module leaves allocated data in stream data. This commit fixes the bug.

Fixes: 9b2bb4f2 ('ALSA: firewire-motu: add stream management functionality')
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

sound/firewire/motu/motu.c

@@ -128,6 +128,7 @@ static void do_registration(struct work_struct *work)
 	return;
 error:
 	snd_motu_transaction_unregister(motu);
+	snd_motu_stream_destroy_duplex(motu);
 	snd_card_free(motu->card);
 	dev_info(&motu->unit->device,
 		 "Sound card registration failed: %d\n", err);