[PATCH] drivers: loongson: Add check for devm_kstrdup()

[Haoxiang Li]

Add check for the return value of devm_kstrdup() in
loongson2_guts_probe() to catch potential exception.

Fixes: b82621ac8450 ("soc: loongson: add GUTS driver for loongson-2 platforms")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Haoxiang Li <haoxiang_li2024@xxxxxxx>
---
 drivers/soc/loongson/loongson2_guts.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/soc/loongson/loongson2_guts.c b/drivers/soc/loongson/loongson2_guts.c
index ae42e3a9127f..26212cfcf6b0 100644
--- a/drivers/soc/loongson/loongson2_guts.c
+++ b/drivers/soc/loongson/loongson2_guts.c
@@ -117,6 +117,8 @@ static int loongson2_guts_probe(struct platform_device *pdev)
 	if (machine)
 		soc_dev_attr.machine = devm_kstrdup(dev, machine, GFP_KERNEL);
 
+	if (!soc_dev_attr.machine)
+		return -ENOMEM;
 	svr = loongson2_guts_get_svr();
 	soc_die = loongson2_soc_die_match(svr, loongson2_soc_die);
 	if (soc_die) {
-- 
2.25.1