[ALSA] emu10k1 - Fix handling of ac97_chip=2

EMU10K1/EMU10K2 driver
Fixed the handling of ac97_chip=2 capability type.
The error occurs in snd_ac97_mixer(), not in snd_ac97_bus().
Also, release the unnecessary ac97_bus object in the error path.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/emu10k1/emumixer.c

@@ -802,21 +802,22 @@ int __devinit snd_emu10k1_mixer(emu10k1_t *emu,
 			.read = snd_emu10k1_ac97_read,
 		};
 
-		if ((err = snd_ac97_bus(emu->card, 0, &ops, NULL, &pbus)) < 0) {
-			if (emu->card_capabilities->ac97_chip == 1)
-				return err;
-			snd_printd(KERN_INFO "emu10k1: AC97 is optional on this board\n");
-			snd_printd(KERN_INFO"          Proceeding without ac97 mixers...\n");
-			goto no_ac97; /* FIXME: get rid of ugly gotos.. */
-		}
+		if ((err = snd_ac97_bus(emu->card, 0, &ops, NULL, &pbus)) < 0)
+			return err;
 		pbus->no_vra = 1; /* we don't need VRA */
 		
 		memset(&ac97, 0, sizeof(ac97));
 		ac97.private_data = emu;
 		ac97.private_free = snd_emu10k1_mixer_free_ac97;
 		ac97.scaps = AC97_SCAP_NO_SPDIF;
-		if ((err = snd_ac97_mixer(pbus, &ac97, &emu->ac97)) < 0)
-			return err;
+		if ((err = snd_ac97_mixer(pbus, &ac97, &emu->ac97)) < 0) {
+			if (emu->card_capabilities->ac97_chip == 1)
+				return err;
+			snd_printd(KERN_INFO "emu10k1: AC97 is optional on this board\n");
+			snd_printd(KERN_INFO"          Proceeding without ac97 mixers...\n");
+			snd_device_free(emu->card, pbus);
+			goto no_ac97; /* FIXME: get rid of ugly gotos.. */
+		}
 		if (emu->audigy) {
 			/* set master volume to 0 dB */
 			snd_ac97_write(emu->ac97, AC97_MASTER, 0x0000);