[PATCH v2] thunderbolt: Fix to check the return value of kmemdup

[Aditya Pakki]

uuid in add_switch is allocted via kmemdup which can fail. The patch
logs the error and cleans up the allocated memory for switch.

Signed-off-by: Aditya Pakki <pakki001@xxxxxxx>

---
v1: Change error handling from WARN_ONCE to return after clean up.
---
 drivers/thunderbolt/icm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c
index e3fc920af682..be1174d86cef 100644
--- a/drivers/thunderbolt/icm.c
+++ b/drivers/thunderbolt/icm.c
@@ -473,6 +473,11 @@ static void add_switch(struct tb_switch *parent_sw, u64 route,
 		goto out;
 
 	sw->uuid = kmemdup(uuid, sizeof(*uuid), GFP_KERNEL);
+	if (!sw->uuid) {
+		WARN_ONCE(1, "cannot allocate memory for switch\n");
+		tb_switch_put(sw);
+		goto out;
+	}
 	sw->connection_id = connection_id;
 	sw->connection_key = connection_key;
 	sw->link = link;
-- 
2.17.1