ALSA: msnd: Remove midi code

Nothing calls snd_msndmidi_new()
  thus nothing sets chip->msndmidi_mpu
    The call to snd_msndmidi_input_read is gated on that being set,
    so snd_msndmidi_input_read() won't be called either.

This is probably a missing call to snd_msndmidi_new(), but since
this is ancient code, it's probably best to remove it (especially
since I don't have the hardware to test it).

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Link: https://patch.msgid.link/20250511172957.1001583-1-linux@treblig.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Author: Dr. David Alan Gilbert

sound/isa/msnd/Makefile

@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
-snd-msnd-lib-y := msnd.o msnd_midi.o msnd_pinnacle_mixer.o
+snd-msnd-lib-y := msnd.o msnd_pinnacle_mixer.o
 snd-msnd-pinnacle-y := msnd_pinnacle.o
 snd-msnd-classic-y := msnd_classic.o
 

sound/isa/msnd/msnd.h

@@ -216,7 +216,6 @@ struct snd_msnd {
 	int			captureLimit;
 	int			capturePeriods;
 	struct snd_card		*card;
-	void			*msndmidi_mpu;
 	struct snd_rawmidi	*rmidi;
 
 	/* Hardware resources */
@@ -286,9 +285,6 @@ int snd_msnd_DAPQ(struct snd_msnd *chip, int start);
 int snd_msnd_DARQ(struct snd_msnd *chip, int start);
 int snd_msnd_pcm(struct snd_card *card, int device);
 
-int snd_msndmidi_new(struct snd_card *card, int device);
-void snd_msndmidi_input_read(void *mpu);
-
 void snd_msndmix_setup(struct snd_msnd *chip);
 int snd_msndmix_new(struct snd_card *card);
 int snd_msndmix_force_recsrc(struct snd_msnd *chip, int recsrc);

sound/isa/msnd/msnd_midi.c

@@ -142,11 +142,6 @@ static void snd_msnd_eval_dsp_msg(struct snd_msnd *chip, u16 wMessage)
 		}
 		break;
 
-	case HIMT_MIDI_IN_UCHAR:
-		if (chip->msndmidi_mpu)
-			snd_msndmidi_input_read(chip->msndmidi_mpu);
-		break;
-
 	default:
 		dev_dbg(chip->card->dev, LOGNAME ": HIMT message %d 0x%02x\n",
 			HIBYTE(wMessage), HIBYTE(wMessage));