diff --git a/sys/dev/sound/pcm/dsp.c b/sys/dev/sound/pcm/dsp.c
--- a/sys/dev/sound/pcm/dsp.c
+++ b/sys/dev/sound/pcm/dsp.c
@@ -467,10 +467,6 @@
 	int prio, ret;
 	pid_t runpid;
 
-	KASSERT(buf != NULL &&
-	    (buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE),
-	    ("%s(): io train wreck!", __func__));
-
 	d = priv->sc;
 	if (!DSP_REGISTERED(d))
 		return (EBADF);
@@ -488,9 +484,6 @@
 		ch = &priv->wrch;
 		chn_io = chn_write;
 		break;
-	default:
-		panic("invalid/corrupted uio direction: %d", buf->uio_rw);
-		break;
 	}
 
 	runpid = buf->uio_td->td_proc->p_pid;