diff mbox series

[4.19,110/338] ASoC: dmaengine: do not use a NULL prepare_slave_config() callback

Message ID 20220414110842.040827448@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH April 14, 2022, 1:10 p.m. UTC 
From: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>

[ Upstream commit 9a1e13440a4f2e7566fd4c5eae6a53e6400e08a4 ]

Even if struct snd_dmaengine_pcm_config is used, prepare_slave_config()
callback might not be set. Check if this callback is set before using it.

Fixes: fa654e085300 ("ASoC: dmaengine-pcm: Provide default config")
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Link: https://lore.kernel.org/r/20220307122202.2251639-2-codrin.ciubotariu@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/soc/soc-generic-dmaengine-pcm.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c
index 232df04ca586..45cce7376191 100644
--- a/sound/soc/soc-generic-dmaengine-pcm.c
+++ b/sound/soc/soc-generic-dmaengine-pcm.c
@@ -91,10 +91,10 @@  static int dmaengine_pcm_hw_params(struct snd_pcm_substream *substream,
 
 	memset(&slave_config, 0, sizeof(slave_config));
 
-	if (!pcm->config)
-		prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config;
-	else
+	if (pcm->config && pcm->config->prepare_slave_config)
 		prepare_slave_config = pcm->config->prepare_slave_config;
+	else
+		prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config;
 
 	if (prepare_slave_config) {
 		ret = prepare_slave_config(substream, params, &slave_config);