From 55b00bdc52f4bcec736dc5fb82b76dd7bafacf17 Mon Sep 17 00:00:00 2001
From: cg <cg@FreeBSD.org>
Date: Tue, 5 Sep 2000 20:58:51 +0000
Subject: [PATCH] be more verbose about failed unload attempts

---
 sys/dev/sound/pcm/sound.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/sys/dev/sound/pcm/sound.c b/sys/dev/sound/pcm/sound.c
index a466fd95fe86..0458cd720296 100644
--- a/sys/dev/sound/pcm/sound.c
+++ b/sys/dev/sound/pcm/sound.c
@@ -331,8 +331,14 @@ pcm_unregister(device_t dev)
 	r = 0;
 	for (i = 0; i < d->chancount; i++)
 		if (d->ref[i]) r = EBUSY;
-	if (r) return r;
-	if (mixer_isbusy(d) || status_isopen) return EBUSY;
+	if (r) {
+		device_printf(dev, "unregister: channel busy");
+		return r;
+	}
+	if (mixer_isbusy(d)) {
+		device_printf(dev, "unregister: mixer busy");
+		return EBUSY;
+	}
 
 	pdev = makedev(CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_CTL, 0));
 	destroy_dev(pdev);
@@ -631,6 +637,8 @@ sndpcm_modevent(module_t mod, int type, void *data)
 	case MOD_LOAD:
 		break;
 	case MOD_UNLOAD:
+		if (status_isopen)
+			return EBUSY;
 		if (status_dev)
 			destroy_dev(status_dev);
 		status_dev = 0;