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ALSA: firewire-tascam: handle error code when getting current source of clock 

The return value of snd_tscm_stream_get_clock() is ignored. This commit
checks the value and handle error.

Fixes: e453df44f0 ("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>
This commit is contained in:
Takashi Sakamoto 2019-09-10 22:51:51 +09:00 committed by Takashi Iwai
parent 2a36c16efa
commit 2617120f4d
1 changed files with 3 additions and 0 deletions
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3
sound/firewire/tascam/tascam-pcm.c
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@ -56,6 +56,9 @@ static int pcm_open(struct snd_pcm_substream *substream)
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)) {