From: Takashi Sakamoto o-takashi@sakamocchi.jp
commit 2617120f4de6d0423384e0e86b14c78b9de84d5a upstream.
The return value of snd_tscm_stream_get_clock() is ignored. This commit checks the value and handle error.
Fixes: e453df44f0d6 ("ALSA: firewire-tascam: add PCM functionality") Cc: stable@vger.kernel.org # v4.4+ Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp Link: https://lore.kernel.org/r/20190910135152.29800-2-o-takashi@sakamocchi.jp Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- sound/firewire/tascam/tascam-pcm.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/sound/firewire/tascam/tascam-pcm.c +++ b/sound/firewire/tascam/tascam-pcm.c @@ -81,6 +81,9 @@ static int pcm_open(struct snd_pcm_subst goto err_locked;
err = snd_tscm_stream_get_clock(tscm, &clock); + if (err < 0) + goto err_locked; + if (clock != SND_TSCM_CLOCK_INTERNAL || amdtp_stream_pcm_running(&tscm->rx_stream) || amdtp_stream_pcm_running(&tscm->tx_stream)) {