From: Aditya Garg <gargaditya08@xxxxxxxx> Some devices have a bug causing them to not work if they query LE tx power on startup. Thus we add a quirk in order to not query it and default min/max tx power values to HCI_TX_POWER_INVALID. Signed-off-by: Aditya Garg <gargaditya08@xxxxxxxx> Reported-by: Orlando Chamberlain <redecorating@xxxxxxxxxxxxxx> Tested-by: Orlando Chamberlain <redecorating@xxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/4970a940-211b-25d6-edab-21a815313954@xxxxxxxxxxxxxx Fixes: 7c395ea521e6 ("Bluetooth: Query LE tx power on startup") Cc: stable@xxxxxxxxxxxxxxx --- v7 :- Added Tested-by. v8 :- Fix checkpatch error. v9 :- Remake patch for Bluetooth-next tree and add Cc: stable@xxxxxxxxxxxxxxx include/net/bluetooth/hci.h | 9 +++++++++ net/bluetooth/hci_sync.c | 3 ++- 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h index 0d2a92168..c4959cf9a 100644 --- a/include/net/bluetooth/hci.h +++ b/include/net/bluetooth/hci.h @@ -246,6 +246,15 @@ enum { * HCI after resume. */ HCI_QUIRK_NO_SUSPEND_NOTIFIER, + + /* + * When this quirk is set, LE tx power is not queried on startup + * and the min/max tx power values default to HCI_TX_POWER_INVALID. + * + * This quirk can be set before hci_register_dev is called or + * during the hdev->setup vendor callback. + */ + HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, }; /* HCI device flags */ diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c index ad86caf41..52e6b5dae 100644 --- a/net/bluetooth/hci_sync.c +++ b/net/bluetooth/hci_sync.c @@ -3283,7 +3283,8 @@ static int hci_le_read_adv_tx_power_sync(struct hci_dev *hdev) /* Read LE Min/Max Tx Power*/ static int hci_le_read_tx_power_sync(struct hci_dev *hdev) { - if (!(hdev->commands[38] & 0x80)) + if (!(hdev->commands[38] & 0x80) || + test_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks)) return 0; return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_TRANSMIT_POWER, -- 2.25.1
