Bluetooth: btbcm: Fix refcount leak in btbcm_get_board_name

of_find_node_by_path() returns a node pointer with refcount incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() in the error path to avoid refcount leak.

---
 drivers/bluetooth/btbcm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

index 76fbb046bdbe..6f05054794e8 100644
@@ -495,8 +495,10 @@ static const char *btbcm_get_board_name(struct device *dev)
 	if (!root)
 		return NULL;
 
-	if (of_property_read_string_index(root, "compatible", 0, &tmp))
+	if (of_property_read_string_index(root, "compatible", 0, &tmp)) {
+		of_node_put(root);
 		return NULL;
+	}
 
 	/* get rid of any '/' in the compatible string */
 	len = strlen(tmp) + 1;

2.25.1

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Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list. This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=647420

---Test result---

Test Summary:

CheckPatch                    PASS      1.58 seconds
GitLint                       PASS      0.95 seconds
SubjectPrefix                 PASS      0.92 seconds
BuildKernel                   PASS      32.38 seconds
BuildKernel32                 PASS      28.97 seconds
Incremental Build with patchesPASS      39.52 seconds
TestRunner: Setup             PASS      478.23 seconds
TestRunner: l2cap-tester      PASS      17.54 seconds
TestRunner: bnep-tester       PASS      6.12 seconds
TestRunner: mgmt-tester       PASS      102.36 seconds
TestRunner: rfcomm-tester     PASS      9.75 seconds
TestRunner: sco-tester        PASS      9.53 seconds
TestRunner: smp-tester        PASS      9.60 seconds
TestRunner: userchan-tester   PASS      6.45 seconds

---
Regards,
Linux Bluetooth

Oops thanks!

Yours,
Linus Walleij