Commit 3884d12e authored by Jaejoong Kim's avatar Jaejoong Kim Committed by Greg Kroah-Hartman

ALSA: usb-audio: Add check return value for usb_string()

commit 89b89d12 upstream.

snd_usb_copy_string_desc() returns zero if usb_string() fails.
In case of failure, we need to check the snd_usb_copy_string_desc()'s
return value and add an exception case
Signed-off-by: 's avatarJaejoong Kim <climbbb.kim@gmail.com>
Signed-off-by: 's avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: 's avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3936d752
......@@ -2178,13 +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");
......
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