Merge tag 'fixes-for-v4.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus

Felipe writes:

usb: fixes for v4.15-rc4

We have a few fixes on dwc3:

- one fix which only happens with some implementations where we need to
  wait longer for some commands to finish.

- Another fix for high-bandwidth isochronous endpoint programming making
  sure that we send the correct DATA tokens in the correct sequence

- A couple PM fixes on dwc3-of-simple

The other synopsys controller driver (dwc2) got a fix for FIFO size
programming.

Other than these, we have a couple Kconfig fixes making sure that
dependencies are properly setup.

1 files changed, 9 insertions, 4 deletions

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 61b348383de8..7c9e361b2200 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -204,6 +204,10 @@ static int snd_usb_copy_string_desc(struct mixer_build *state,
 				    int index, char *buf, int maxlen)
 {
 	int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
+
+	if (len < 0)
+		return 0;
+
 	buf[len] = 0;
 	return len;
 }
@@ -2174,13 +2178,14 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid,
 	if (len)
 		;
 	else if (nameid)
-		snd_usb_copy_string_desc(state, nameid, kctl->id.name,
+		len = snd_usb_copy_string_desc(state, nameid, kctl->id.name,
 					 sizeof(kctl->id.name));
-	else {
+	else
 		len = get_term_name(state, &state->oterm,
 				    kctl->id.name, sizeof(kctl->id.name), 0);
-		if (!len)
-			strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
+
+	if (!len) {
+		strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
 
 		if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
 			append_ctl_name(kctl, " Clock Source");