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| author | Takashi Iwai <tiwai@suse.de> | 2021-05-20 14:37:42 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2021-05-21 16:16:21 +0200 |
| commit | be22db77dc50be6d9cf2b20ab689706c9031c054 (patch) | |
| tree | e052714e4349c71531856f9a0a7df9dacf303369 /sound/usb | |
| parent | bdaedca74d6293b6ac643a8ebe8231b52bf1171b (diff) | |
| download | linux-be22db77dc50be6d9cf2b20ab689706c9031c054.tar.bz2 | |
ALSA: usb-audio: Fix uninitialized variable at __uac_clock_find_source()
The cur variable indicating the currently selected clock source can be
theoretically used as uninitialized after the recent commit
481f17c41803 ("ALSA: usb-audio: Handle error for the current selector
gracefully"). For addressing it, initialize it before use.
Also, one place seems setting 0 to a wrong variable ret, instead of
cur; otherwise it makes little sense. Since the initialization is
done beforehand, we can get rid of this line, too.
Fixes: 481f17c41803 ("ALSA: usb-audio: Handle error for the current selector gracefully")
Reported-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/4b261d68-f53f-240d-2d8a-2f88b337849d@canonical.com
Link: https://lore.kernel.org/r/s5hfsyhh97t.wl-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb')
| -rw-r--r-- | sound/usb/clock.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/usb/clock.c b/sound/usb/clock.c index 772478c725c2..0afae839d295 100644 --- a/sound/usb/clock.c +++ b/sound/usb/clock.c @@ -290,6 +290,7 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip, pins = GET_VAL(selector, proto, bNrInPins); clock_id = GET_VAL(selector, proto, bClockID); sources = GET_VAL(selector, proto, baCSourceID); + cur = 0; if (pins == 1) { ret = 1; @@ -314,7 +315,6 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip, if (!chip->autoclock) return -EINVAL; - ret = 0; goto find_others; } |