sound: Stop checking for failures from malloc(M_WAITOK)

Reviewed by:	emaste
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D45852

2 files changed, 21 insertions, 29 deletions

diff --git a/sys/dev/sound/macio/i2s.c b/sys/dev/sound/macio/i2s.c
index 5f8cb3aa15f7..647d66c27bba 100644
--- a/sys/dev/sound/macio/i2s.c
+++ b/sys/dev/sound/macio/i2s.c
@@ -241,10 +241,8 @@ i2s_attach(device_t self)
 	 * Register a hook for delayed attach in order to allow
 	 * the I2C controller to attach.
 	 */
-	if ((i2s_delayed_attach = malloc(sizeof(struct intr_config_hook), 
-	    M_TEMP, M_WAITOK | M_ZERO)) == NULL)
-		return (ENOMEM);
-
+	i2s_delayed_attach = malloc(sizeof(struct intr_config_hook),
+	    M_TEMP, M_WAITOK | M_ZERO);
 	i2s_delayed_attach->ich_func = i2s_postattach;
 	i2s_delayed_attach->ich_arg = sc;
 
diff --git a/sys/dev/sound/usb/uaudio.c b/sys/dev/sound/usb/uaudio.c
index 166af8a0857d..0a8878c072d2 100644
--- a/sys/dev/sound/usb/uaudio.c
+++ b/sys/dev/sound/usb/uaudio.c
@@ -2687,8 +2687,6 @@ uaudio_chan_init(struct uaudio_chan *ch, struct snd_dbuf *b,
 	DPRINTF("Worst case buffer is %d bytes\n", (int)buf_size);
 
 	ch->buf = malloc(buf_size, M_DEVBUF, M_WAITOK | M_ZERO);
-	if (ch->buf == NULL)
-		goto error;
 	if (sndbuf_setup(b, ch->buf, buf_size) != 0)
 		goto error;
 
@@ -3256,31 +3254,27 @@ uaudio_mixer_add_ctl_sub(struct uaudio_softc *sc, struct uaudio_mixer_node *mc)
 	    malloc(sizeof(*p_mc_new), M_USBDEV, M_WAITOK);
 	int ch;
 
-	if (p_mc_new != NULL) {
-		memcpy(p_mc_new, mc, sizeof(*p_mc_new));
-		p_mc_new->next = sc->sc_mixer_root;
-		sc->sc_mixer_root = p_mc_new;
-		sc->sc_mixer_count++;
+	memcpy(p_mc_new, mc, sizeof(*p_mc_new));
+	p_mc_new->next = sc->sc_mixer_root;
+	sc->sc_mixer_root = p_mc_new;
+	sc->sc_mixer_count++;
 
-		/* set default value for all channels */
-		for (ch = 0; ch < p_mc_new->nchan; ch++) {
-			switch (p_mc_new->val_default) {
-			case 1:
-				/* 50% */
-				p_mc_new->wData[ch] = (p_mc_new->maxval + p_mc_new->minval) / 2;
-				break;
-			case 2:
-				/* 100% */
-				p_mc_new->wData[ch] = p_mc_new->maxval;
-				break;
-			default:
-				/* 0% */
-				p_mc_new->wData[ch] = p_mc_new->minval;
-				break;
-			}
+	/* set default value for all channels */
+	for (ch = 0; ch < p_mc_new->nchan; ch++) {
+		switch (p_mc_new->val_default) {
+		case 1:
+			/* 50% */
+			p_mc_new->wData[ch] = (p_mc_new->maxval + p_mc_new->minval) / 2;
+			break;
+		case 2:
+			/* 100% */
+			p_mc_new->wData[ch] = p_mc_new->maxval;
+			break;
+		default:
+			/* 0% */
+			p_mc_new->wData[ch] = p_mc_new->minval;
+			break;
 		}
-	} else {
-		DPRINTF("out of memory\n");
 	}
 }