diff mbox series

[5.16,21/37] Bluetooth: add quirk disabling LE Read Transmit Power

Message ID 20220114081545.542147427@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Jan. 14, 2022, 8:16 a.m. UTC 
From: Aditya Garg <gargaditya08@live.com>

commit d2f8114f9574509580a8506d2ef72e7e43d1a5bd upstream.

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@live.com>
Reported-by: Orlando Chamberlain <redecorating@protonmail.com>
Tested-by: Orlando Chamberlain <redecorating@protonmail.com>
Link:
https://lore.kernel.org/r/4970a940-211b-25d6-edab-21a815313954@protonmail.com
Fixes: 7c395ea521e6 ("Bluetooth: Query LE tx power on startup")
Cc: stable@vger.kernel.org
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 include/net/bluetooth/hci.h |    9 +++++++++
 net/bluetooth/hci_core.c    |    3 ++-
 2 files changed, 11 insertions(+), 1 deletion(-)
diff mbox series

Patch

--- 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 */
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -619,7 +619,8 @@  static int hci_init3_req(struct hci_requ
 			hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
 		}
 
-		if (hdev->commands[38] & 0x80) {
+		if ((hdev->commands[38] & 0x80) &&
+		    !test_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks)) {
 			/* Read LE Min/Max Tx Power*/
 			hci_req_add(req, HCI_OP_LE_READ_TRANSMIT_POWER,
 				    0, NULL);