diff --git a/sys/dev/sound/dummy.c b/sys/dev/sound/dummy.c
--- a/sys/dev/sound/dummy.c
+++ b/sys/dev/sound/dummy.c
@@ -132,8 +132,7 @@
 	uint8_t *buf;
 
 	buf = ch->buf->buf;
-	if (buf != NULL)
-		free(buf, M_DEVBUF);
+	free(buf, M_DEVBUF);
 
 	return (0);
 }
diff --git a/sys/dev/sound/fdt/audio_soc.c b/sys/dev/sound/fdt/audio_soc.c
--- a/sys/dev/sound/fdt/audio_soc.c
+++ b/sys/dev/sound/fdt/audio_soc.c
@@ -250,8 +250,7 @@
 	ausoc_chan = (struct audio_soc_channel *)data;
 
 	buffer = ausoc_chan->buf->buf;
-	if (buffer)
-		free(buffer, M_DEVBUF);
+	free(buffer, M_DEVBUF);
 
 	return (0);
 }
@@ -508,8 +507,7 @@
 	struct audio_soc_aux_node *aux;
 
 	sc = device_get_softc(dev);
-	if (sc->name)
-		free(sc->name, M_DEVBUF);
+	free(sc->name, M_DEVBUF);
 
 	while ((aux = SLIST_FIRST(&sc->aux_devs)) != NULL) {
 		SLIST_REMOVE_HEAD(&sc->aux_devs, link);
diff --git a/sys/dev/sound/midi/midi.c b/sys/dev/sound/midi/midi.c
--- a/sys/dev/sound/midi/midi.c
+++ b/sys/dev/sound/midi/midi.c
@@ -153,10 +153,8 @@
 err2:
 	mtx_destroy(&m->lock);
 
-	if (MIDIQ_BUF(m->inq))
-		free(MIDIQ_BUF(m->inq), M_MIDI);
-	if (MIDIQ_BUF(m->outq))
-		free(MIDIQ_BUF(m->outq), M_MIDI);
+	free(MIDIQ_BUF(m->inq), M_MIDI);
+	free(MIDIQ_BUF(m->outq), M_MIDI);
 err1:
 	free(m, M_MIDI);
 	return NULL;
diff --git a/sys/dev/sound/pci/cmi.c b/sys/dev/sound/pci/cmi.c
--- a/sys/dev/sound/pci/cmi.c
+++ b/sys/dev/sound/pci/cmi.c
@@ -1009,8 +1009,7 @@
 	if (sc->reg)
 		bus_release_resource(dev, SYS_RES_IOPORT, sc->regid, sc->reg);
 	mtx_destroy(&sc->lock);
-	if (sc)
-		free(sc, M_DEVBUF);
+	free(sc, M_DEVBUF);
 
 	return ENXIO;
 }
diff --git a/sys/dev/sound/pci/envy24.c b/sys/dev/sound/pci/envy24.c
--- a/sys/dev/sound/pci/envy24.c
+++ b/sys/dev/sound/pci/envy24.c
@@ -1611,10 +1611,8 @@
 	device_printf(sc->dev, "envy24chan_free()\n");
 #endif
 	mtx_lock(&sc->lock);
-	if (ch->data != NULL) {
-		free(ch->data, M_ENVY24);
-		ch->data = NULL;
-	}
+	free(ch->data, M_ENVY24);
+	ch->data = NULL;
 	mtx_unlock(&sc->lock);
 
 	return 0;
diff --git a/sys/dev/sound/pci/envy24ht.c b/sys/dev/sound/pci/envy24ht.c
--- a/sys/dev/sound/pci/envy24ht.c
+++ b/sys/dev/sound/pci/envy24ht.c
@@ -1522,10 +1522,8 @@
 	device_printf(sc->dev, "envy24htchan_free()\n");
 #endif
 	mtx_lock(&sc->lock);
-	if (ch->data != NULL) {
-		free(ch->data, M_ENVY24HT);
-		ch->data = NULL;
-	}
+	free(ch->data, M_ENVY24HT);
+	ch->data = NULL;
 	mtx_unlock(&sc->lock);
 
 	return 0;
diff --git a/sys/dev/sound/pci/es137x.c b/sys/dev/sound/pci/es137x.c
--- a/sys/dev/sound/pci/es137x.c
+++ b/sys/dev/sound/pci/es137x.c
@@ -1886,8 +1886,7 @@
 	if (es->reg)
 		bus_release_resource(dev, es->regtype, es->regid, es->reg);
 	mtx_destroy(&es->lock);
-	if (es)
-		free(es, M_DEVBUF);
+	free(es, M_DEVBUF);
 	return (ENXIO);
 }
 
diff --git a/sys/dev/sound/pci/hdsp-pcm.c b/sys/dev/sound/pci/hdsp-pcm.c
--- a/sys/dev/sound/pci/hdsp-pcm.c
+++ b/sys/dev/sound/pci/hdsp-pcm.c
@@ -677,14 +677,10 @@
 #endif
 
 	mtx_lock(&sc->lock);
-	if (ch->data != NULL) {
-		free(ch->data, M_HDSP);
-		ch->data = NULL;
-	}
-	if (ch->caps != NULL) {
-		free(ch->caps, M_HDSP);
-		ch->caps = NULL;
-	}
+	free(ch->data, M_HDSP);
+	ch->data = NULL;
+	free(ch->caps, M_HDSP);
+	ch->caps = NULL;
 	mtx_unlock(&sc->lock);
 
 	return (0);
diff --git a/sys/dev/sound/pci/hdspe-pcm.c b/sys/dev/sound/pci/hdspe-pcm.c
--- a/sys/dev/sound/pci/hdspe-pcm.c
+++ b/sys/dev/sound/pci/hdspe-pcm.c
@@ -668,14 +668,10 @@
 #endif
 
 	mtx_lock(&sc->lock);
-	if (ch->data != NULL) {
-		free(ch->data, M_HDSPE);
-		ch->data = NULL;
-	}
-	if (ch->caps != NULL) {
-		free(ch->caps, M_HDSPE);
-		ch->caps = NULL;
-	}
+	free(ch->data, M_HDSPE);
+	ch->data = NULL;
+	free(ch->caps, M_HDSPE);
+	ch->caps = NULL;
 	mtx_unlock(&sc->lock);
 
 	return (0);
diff --git a/sys/dev/sound/pci/via8233.c b/sys/dev/sound/pci/via8233.c
--- a/sys/dev/sound/pci/via8233.c
+++ b/sys/dev/sound/pci/via8233.c
@@ -1385,8 +1385,7 @@
 	if (via->sgd_dmat)
 		bus_dma_tag_destroy(via->sgd_dmat);
 	mtx_destroy(&via->lock);
-	if (via)
-		free(via, M_DEVBUF);
+	free(via, M_DEVBUF);
 	return (ENXIO);
 }
 
diff --git a/sys/dev/sound/pci/via82c686.c b/sys/dev/sound/pci/via82c686.c
--- a/sys/dev/sound/pci/via82c686.c
+++ b/sys/dev/sound/pci/via82c686.c
@@ -601,7 +601,7 @@
 	if (via->sgd_table) bus_dmamem_free(via->sgd_dmat, via->sgd_table, via->sgd_dmamap);
 	if (via->sgd_dmat) bus_dma_tag_destroy(via->sgd_dmat);
 	mtx_destroy(&via->lock);
-	if (via) free(via, M_DEVBUF);
+	free(via, M_DEVBUF);
 	return ENXIO;
 }
 
diff --git a/sys/dev/sound/pcm/buffer.c b/sys/dev/sound/pcm/buffer.c
--- a/sys/dev/sound/pcm/buffer.c
+++ b/sys/dev/sound/pcm/buffer.c
@@ -129,11 +129,8 @@
 void
 sndbuf_free(struct snd_dbuf *b)
 {
-	if (b->tmpbuf)
-		free(b->tmpbuf, M_DEVBUF);
-
-	if (b->shadbuf)
-		free(b->shadbuf, M_DEVBUF);
+	free(b->tmpbuf, M_DEVBUF);
+	free(b->shadbuf, M_DEVBUF);
 
 	if (b->buf) {
 		if (b->flags & SNDBUF_F_MANAGED) {
@@ -188,8 +185,7 @@
 			printf("%s(): b=%p %p -> %p [%d -> %d : %d]\n",
 			    __func__, b, b->tmpbuf, tmpbuf,
 			    b->allocsize, allocsize, bufsize);
-		if (b->tmpbuf != NULL)
-			free(b->tmpbuf, M_DEVBUF);
+		free(b->tmpbuf, M_DEVBUF);
 		b->tmpbuf = tmpbuf;
 		b->allocsize = allocsize;
 	} else if (snd_verbose > 3)
@@ -225,14 +221,11 @@
 		tmpbuf = malloc(allocsize, M_DEVBUF, M_WAITOK);
 		shadbuf = malloc(allocsize, M_DEVBUF, M_WAITOK);
 		CHN_LOCK(b->channel);
-		if (b->buf != NULL)
-			free(b->buf, M_DEVBUF);
+		free(b->buf, M_DEVBUF);
 		b->buf = buf;
-		if (b->tmpbuf != NULL)
-			free(b->tmpbuf, M_DEVBUF);
+		free(b->tmpbuf, M_DEVBUF);
 		b->tmpbuf = tmpbuf;
-		if (b->shadbuf != NULL)
-			free(b->shadbuf, M_DEVBUF);
+		free(b->shadbuf, M_DEVBUF);
 		b->shadbuf = shadbuf;
 		if (snd_verbose > 3)
 			printf("%s(): b=%p %d -> %d [%d]\n",
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
@@ -2582,8 +2582,7 @@
 
 out:
 	if (ret != 0) {
-		if (smrd != NULL)
-			free(smrd, M_DEVBUF);
+		free(smrd, M_DEVBUF);
 		if ((sg != NULL) && SLIST_EMPTY(&sg->members)) {
 			sg_ids[2] = sg->id;
 			SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
diff --git a/sys/dev/sound/pcm/feeder_eq.c b/sys/dev/sound/pcm/feeder_eq.c
--- a/sys/dev/sound/pcm/feeder_eq.c
+++ b/sys/dev/sound/pcm/feeder_eq.c
@@ -353,8 +353,7 @@
 	struct feed_eq_info *info;
 
 	info = f->data;
-	if (info != NULL)
-		free(info, M_DEVBUF);
+	free(info, M_DEVBUF);
 
 	f->data = NULL;
 
diff --git a/sys/dev/sound/pcm/feeder_format.c b/sys/dev/sound/pcm/feeder_format.c
--- a/sys/dev/sound/pcm/feeder_format.c
+++ b/sys/dev/sound/pcm/feeder_format.c
@@ -90,8 +90,7 @@
 	struct feed_format_info *info;
 
 	info = f->data;
-	if (info != NULL)
-		free(info, M_DEVBUF);
+	free(info, M_DEVBUF);
 
 	f->data = NULL;
 
diff --git a/sys/dev/sound/pcm/feeder_matrix.c b/sys/dev/sound/pcm/feeder_matrix.c
--- a/sys/dev/sound/pcm/feeder_matrix.c
+++ b/sys/dev/sound/pcm/feeder_matrix.c
@@ -317,8 +317,7 @@
 	struct feed_matrix_info *info;
 
 	info = f->data;
-	if (info != NULL)
-		free(info, M_DEVBUF);
+	free(info, M_DEVBUF);
 
 	f->data = NULL;
 
diff --git a/sys/dev/sound/pcm/feeder_mixer.c b/sys/dev/sound/pcm/feeder_mixer.c
--- a/sys/dev/sound/pcm/feeder_mixer.c
+++ b/sys/dev/sound/pcm/feeder_mixer.c
@@ -100,8 +100,7 @@
 	struct feed_mixer_info *info;
 
 	info = f->data;
-	if (info != NULL)
-		free(info, M_DEVBUF);
+	free(info, M_DEVBUF);
 
 	f->data = NULL;
 
diff --git a/sys/dev/sound/pcm/feeder_rate.c b/sys/dev/sound/pcm/feeder_rate.c
--- a/sys/dev/sound/pcm/feeder_rate.c
+++ b/sys/dev/sound/pcm/feeder_rate.c
@@ -714,10 +714,8 @@
 	info->z_size = 1;
 	info->z_coeff = NULL;
 	info->z_dcoeff = NULL;
-	if (info->z_pcoeff != NULL) {
-		free(info->z_pcoeff, M_DEVBUF);
-		info->z_pcoeff = NULL;
-	}
+	free(info->z_pcoeff, M_DEVBUF);
+	info->z_pcoeff = NULL;
 	info->z_scale = Z_ONE;
 	info->z_dx = Z_FULL_ONE;
 	info->z_dy = Z_FULL_ONE;
@@ -1029,10 +1027,8 @@
 	int32_t alpha, c, i, z, idx;
 
 	/* Let this be here first. */
-	if (info->z_pcoeff != NULL) {
-		free(info->z_pcoeff, M_DEVBUF);
-		info->z_pcoeff = NULL;
-	}
+	free(info->z_pcoeff, M_DEVBUF);
+	info->z_pcoeff = NULL;
 
 	if (feeder_rate_polyphase_max < 1)
 		return (ENOTSUP);
@@ -1154,10 +1150,8 @@
 		 * adaptive mode.
 		 */
 z_setup_adaptive_sinc:
-		if (info->z_pcoeff != NULL) {
-			free(info->z_pcoeff, M_DEVBUF);
-			info->z_pcoeff = NULL;
-		}
+		free(info->z_pcoeff, M_DEVBUF);
+		info->z_pcoeff = NULL;
 
 		if (adaptive == 0) {
 			info->z_dy = z_scale << Z_DRIFT_SHIFT;
@@ -1333,8 +1327,7 @@
 
 	if (info->z_delay == NULL || info->z_alloc < i ||
 	    i <= (info->z_alloc >> 1)) {
-		if (info->z_delay != NULL)
-			free(info->z_delay, M_DEVBUF);
+		free(info->z_delay, M_DEVBUF);
 		info->z_delay = malloc(i, M_DEVBUF, M_NOWAIT | M_ZERO);
 		if (info->z_delay == NULL)
 			return (ENOMEM);
@@ -1517,10 +1510,8 @@
 
 	ret = z_resampler_setup(f);
 	if (ret != 0) {
-		if (info->z_pcoeff != NULL)
-			free(info->z_pcoeff, M_DEVBUF);
-		if (info->z_delay != NULL)
-			free(info->z_delay, M_DEVBUF);
+		free(info->z_pcoeff, M_DEVBUF);
+		free(info->z_delay, M_DEVBUF);
 		free(info, M_DEVBUF);
 		f->data = NULL;
 	}
@@ -1534,13 +1525,9 @@
 	struct z_info *info;
 
 	info = f->data;
-	if (info != NULL) {
-		if (info->z_pcoeff != NULL)
-			free(info->z_pcoeff, M_DEVBUF);
-		if (info->z_delay != NULL)
-			free(info->z_delay, M_DEVBUF);
-		free(info, M_DEVBUF);
-	}
+	free(info->z_pcoeff, M_DEVBUF);
+	free(info->z_delay, M_DEVBUF);
+	free(info, M_DEVBUF);
 
 	f->data = NULL;
 
diff --git a/sys/dev/sound/pcm/feeder_volume.c b/sys/dev/sound/pcm/feeder_volume.c
--- a/sys/dev/sound/pcm/feeder_volume.c
+++ b/sys/dev/sound/pcm/feeder_volume.c
@@ -193,8 +193,7 @@
 	struct feed_volume_info *info;
 
 	info = f->data;
-	if (info != NULL)
-		free(info, M_DEVBUF);
+	free(info, M_DEVBUF);
 
 	f->data = NULL;
 
diff --git a/sys/dev/sound/usb/uaudio.c b/sys/dev/sound/usb/uaudio.c
--- a/sys/dev/sound/usb/uaudio.c
+++ b/sys/dev/sound/usb/uaudio.c
@@ -2704,10 +2704,8 @@
 int
 uaudio_chan_free(struct uaudio_chan *ch)
 {
-	if (ch->buf != NULL) {
-		free(ch->buf, M_DEVBUF);
-		ch->buf = NULL;
-	}
+	free(ch->buf, M_DEVBUF);
+	ch->buf = NULL;
 	usbd_transfer_unsetup(ch->xfer, UAUDIO_NCHANBUFS + 1);
 
 	ch->num_alt = 0;