target/linux/bcm27xx/patches-6.1/950-0699-Bluetooth-hci_sync-Add-fallback-bd-address-prop.patch

   1 From dffb648dffeab7246040a30b7d1669387d1e767e Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.com>
   3 Date: Tue, 25 Apr 2023 11:49:41 +0100
   4 Subject: [PATCH] Bluetooth: hci_sync: Add fallback-bd-address prop
   5
   6 The kernel Bluetooth framework understands that devices may not
   7 be programmed with valid Bluetooth addresses. It also has the ability
   8 to override a Bluetooth address with the value of the local-bd-address
   9 DT property, but it ignores the validity of the existing address when
  10 doing so.
  11
  12 Add a new boolean property, fallback-bd-address, which indicates that
  13 the given local-bd-address property should only be used if the device
  14 does not already have a valid BDADDR.
  15
  16 Signed-off-by: Phil Elwell <phil@raspberrypi.com>
  17 ---
  18  net/bluetooth/hci_sync.c | 5 ++++-
  19  1 file changed, 4 insertions(+), 1 deletion(-)
  20
  21 --- a/net/bluetooth/hci_sync.c
  22 +++ b/net/bluetooth/hci_sync.c
  23 @@ -4630,6 +4630,7 @@ static const struct {
  24   */
  25  static int hci_dev_setup_sync(struct hci_dev *hdev)
  26  {
  27 +       struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
  28         int ret = 0;
  29         bool invalid_bdaddr;
  30         size_t i;
  31 @@ -4658,7 +4659,9 @@ static int hci_dev_setup_sync(struct hci
  32
  33         if (!ret) {
  34                 if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks) &&
  35 -                   !bacmp(&hdev->public_addr, BDADDR_ANY))
  36 +                   !bacmp(&hdev->public_addr, BDADDR_ANY) &&
  37 +                   (invalid_bdaddr ||
  38 +                    !fwnode_property_present(fwnode, "fallback-bd-address")))
  39                         hci_dev_get_bd_addr_from_property(hdev);
  40
  41                 if ((invalid_bdaddr ||