diff options
| author | Jaejoong Kim <climbbb.kim@gmail.com> | 2017-12-04 15:31:49 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-16 10:33:49 +0100 |
| commit | 90a20a81dc1c05ceb8dc215d9e475b5cc66241a8 (patch) | |
| tree | 1ecafb56ab3fa848736d1346282d29ed1a96e4f6 /sound | |
| parent | 9f5c6b108850b020b74175b8aa0cec88303869cf (diff) | |
ALSA: usb-audio: Add check return value for usb_string()
commit 89b89d121ffcf8d9546633b98ded9d18b8f75891 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: Jaejoong Kim <climbbb.kim@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/usb/mixer.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index 90ea49a53dc0..0ed9ae030ce1 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -2106,13 +2106,14 @@ 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"); |