diff options
| author | Jaejoong Kim <climbbb.kim@gmail.com> | 2017-12-04 15:31:49 +0900 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-12-04 09:15:55 +0100 |
| commit | 89b89d121ffcf8d9546633b98ded9d18b8f75891 (patch) | |
| tree | d1e027d564b848364fc4238249995fe9c8d0ed22 | |
| parent | 251552a2b0d454badc8f486e6d79100970c744b0 (diff) | |
ALSA: usb-audio: Add check return value for usb_string()
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>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -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 8e18f7ec51f4..afc208e1c756 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -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"); |