[PATCH 3/7] soundwire: intel: fix NULL/ERR_PTR confusion

[Bard Liao]

From: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>

snd_soc_dai_get_sdw_stream() can only return the pointer to stream or
an ERR_PTR value, NULL is not a possible value.

Fixes: 09553140c8d7b ('soundwire: intel: implement get_sdw_stream() operations')
Reported-by: Bard Liao <yung-chuan.liao at linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
Reviewed-by: Rander Wang <rander.wang at linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao at linux.intel.com>
---
 drivers/soundwire/intel.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index ebca8ced59ec..bbfb86ffa653 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -1106,7 +1106,7 @@ static void *intel_get_sdw_stream(struct snd_soc_dai *dai,
 		dma = dai->capture_dma_data;
 
 	if (!dma)
-		return NULL;
+		return ERR_PTR(-EINVAL);
 
 	return dma->stream;
 }
-- 
2.17.1