diff options
| author | Jaejoong Kim <climbbb.kim@gmail.com> | 2017-12-04 15:31:49 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-14 09:28:13 +0100 |
| commit | 173c8c346587cfdca49f73b6cc2ac6500f425112 (patch) | |
| tree | 4e8a8d610b71af6291c81c215d7dda32a0ad795a /sound | |
| parent | c40457c952ecd218731a81aab33c422491f557a0 (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 1196bb2bd5ff..24c897f0b571 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -2172,13 +2172,14 @@ 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"); |