* improve error handling

* be more specific in verbose boot messages
* allow the feeder subsystem to veto pcm* attaching if there is an error
  initialising the root feeder
* don't free/malloc a new tmpbuf when resizing a snd_dbuf to the same size as
  it currently is
* store the feeder description in the feeder structure instead of mallocing
  space for it

1 files changed, 8 insertions, 0 deletions

diff --git a/sys/dev/sound/pcm/sound.c b/sys/dev/sound/pcm/sound.c
index cbd1bc1..535fe35 100644
--- a/sys/dev/sound/pcm/sound.c
+++ b/sys/dev/sound/pcm/sound.c
@@ -55,6 +55,8 @@ struct snddev_info {
 
 devclass_t pcm_devclass;
 
+int pcm_veto_load = 1;
+
 #ifdef USING_DEVFS
 int snd_unit = 0;
 TUNABLE_INT("hw.snd.unit", &snd_unit);
@@ -599,6 +601,12 @@ pcm_register(device_t dev, void *devinfo, int numplay, int numrec)
 {
     	struct snddev_info *d = device_get_softc(dev);
 
+	if (pcm_veto_load) {
+		device_printf(dev, "disabled due to an error while initialising: %d\n", pcm_veto_load);
+
+		return EINVAL;
+	}
+
 	d->lock = snd_mtxcreate(device_get_nameunit(dev));
 	snd_mtxlock(d->lock);