[PATCH 2/2] ASoC: SDCA: Check return value on a missing FDL_Set_Index Range

[Maciej Strozek <mstrozek@opensource.cirrus.com>]

In case of a missing FDL_Set_Index control the return value can be NULL,
ensure the functions returns before passing it on to range search.

Fixes: 71f7990a34cd ("ASoC: SDCA: Add FDL library for XU entities")
Signed-off-by: Maciej Strozek <mstrozek@opensource.cirrus.com>
---
 sound/soc/sdca/sdca_fdl.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/sdca/sdca_fdl.c b/sound/soc/sdca/sdca_fdl.c
index e08a553e0eab0..7fc809707944d 100644
--- a/sound/soc/sdca/sdca_fdl.c
+++ b/sound/soc/sdca/sdca_fdl.c
@@ -301,6 +301,8 @@ static struct sdca_fdl_set *fdl_get_set(struct sdca_interrupt *interrupt)
 
 	range = sdca_selector_find_range(dev, xu, SDCA_CTL_XU_FDL_SET_INDEX,
 					 SDCA_FDL_SET_INDEX_NCOLS, 0);
+	if (!range)
+		return NULL;
 
 	val = sdca_range_search(range, SDCA_FDL_SET_INDEX_SET_NUMBER,
 				val, SDCA_FDL_SET_INDEX_FILE_SET_ID);
-- 
2.47.3