From e6e7bf7087fb50a404f684092bd522ece2533d34 Mon Sep 17 00:00:00 2001
From: Christos Margiolis <christos@FreeBSD.org>
Date: Mon, 6 May 2024 20:26:56 +0200
Subject: [PATCH] sound: Add __assert_unreachable() to default cases in
 pcm_chn_add() and pcm_chn_remove()

We should normally never enter these cases.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Reviewed by:	markj, emaste
Differential Revision:	https://reviews.freebsd.org/D44994

(cherry picked from commit 76f95bae092b7353ff82b7a0056ca5801bb98f76)
---
 sys/dev/sound/pcm/sound.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sys/dev/sound/pcm/sound.c b/sys/dev/sound/pcm/sound.c
index cc19d119ac3..2787c0ee126 100644
--- a/sys/dev/sound/pcm/sound.c
+++ b/sys/dev/sound/pcm/sound.c
@@ -403,7 +403,7 @@ pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch)
 		d->rvchancount++;
 		break;
 	default:
-		break;
+		__assert_unreachable();
 	}
 
 	return (0);
@@ -443,7 +443,7 @@ pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch)
 		d->rvchancount--;
 		break;
 	default:
-		break;
+		__assert_unreachable();
 	}
 
 	return (0);