openwrt/target/linux/bcm27xx/patches-6.6/950-1218-Bluetooth-hci_sync-Fix-crash-on-NULL-parent.patch

From ad2babc6596ba4f500454a4eaa607f3b49fcbcbe Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Wed, 7 Aug 2024 17:41:31 +0100
Subject: [PATCH 1218/1350] Bluetooth: hci_sync: Fix crash on NULL parent

Although later functions can handle a NULL fwnode, fwnode can't handle
being passed a NULL pointer.

See: https://github.com/raspberrypi/linux/issues/6305

Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
 net/bluetooth/hci_sync.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -4865,7 +4865,8 @@ static const struct {
  */
 static int hci_dev_setup_sync(struct hci_dev *hdev)
 {
-	struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
+	struct fwnode_handle *fwnode =
+		hdev->dev.parent ? dev_fwnode(hdev->dev.parent) : NULL;
 	int ret = 0;
 	bool invalid_bdaddr;
 	size_t i;