[PATCH AUTOSEL 4.19 020/244] ASoC: hdmi-codec: unlock the device on startup errors

Sasha Levin
2019-05-22T19:49:18Z

From: Jerome Brunet <jbrunet@baylibre.com>

[ Upstream commit 30180e8436046344b12813dc954b2e01dfdcd22d ]

If the hdmi codec startup fails, it should clear the current_substream
pointer to free the device. This is properly done for the audio_startup()
callback but for snd_pcm_hw_constraint_eld().

Make sure the pointer cleared if an error is reported.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/soc/codecs/hdmi-codec.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index d5f73c8372817..7994e8ddc7d21 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -439,8 +439,12 @@ static int hdmi_codec_startup(struct snd_pcm_substream *substream,
if (!ret) {
ret = snd_pcm_hw_constraint_eld(substream->runtime,
hcp->eld);
- if (ret)
+ if (ret) {
+ mutex_lock(&hcp->current_stream_lock);
+ hcp->current_stream = NULL;
+ mutex_unlock(&hcp->current_stream_lock);
return ret;
+ }
}
/* Select chmap supported */
hdmi_codec_eld_chmap(hcp);
--
2.20.1