[PATCH][next] ASoC: rsnd: check for zero node count

[Colin King]

From: Colin Ian King <colin.king at canonical.com>

The call to rsnd_node_count can potentially return a zero node count
so add a check for this corner case. (Note that the two other calls
to rsnd_node_count in the kernel perform this check, so I think it
justifies adding this). This avoids using a zero nr in a devm_kcalloc
call.

Addresses-Coverity: ("Unchecked return value")
Fixes: c413983eb66a ("ASoC: rsnd: adjust disabled module")
Signed-off-by: Colin Ian King <colin.king at canonical.com>
---
 sound/soc/sh/rcar/ssiu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/sh/rcar/ssiu.c b/sound/soc/sh/rcar/ssiu.c
index 5682c74bb7ff..0d8f97633dd2 100644
--- a/sound/soc/sh/rcar/ssiu.c
+++ b/sound/soc/sh/rcar/ssiu.c
@@ -515,6 +515,9 @@ int rsnd_ssiu_probe(struct rsnd_priv *priv)
 	else
 		nr = priv->ssi_nr;
 
+	if (!nr)
+		return -EINVAL;
+
 	ssiu	= devm_kcalloc(dev, nr, sizeof(*ssiu), GFP_KERNEL);
 	if (!ssiu)
 		return -ENOMEM;
-- 
2.31.1