From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Date: Tue, 22 Aug 2023 19:02:03 +0000 (-0700)
Subject: Bluetooth: HCI: Introduce HCI_QUIRK_BROKEN_LE_CODED
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=253f3399f4c09ce6f4e67350f839be0361b4d5ff;p=linux.git

Bluetooth: HCI: Introduce HCI_QUIRK_BROKEN_LE_CODED

This introduces HCI_QUIRK_BROKEN_LE_CODED which is used to indicate
that LE Coded PHY shall not be used, it is then set for some Intel
models that claim to support it but when used causes many problems.

Cc: stable@vger.kernel.org # 6.4.y+
Link: https://github.com/bluez/bluez/issues/577
Link: https://github.com/bluez/bluez/issues/582
Link: https://lore.kernel.org/linux-bluetooth/CABBYNZKco-v7wkjHHexxQbgwwSz-S=GZ=dZKbRE1qxT1h4fFbQ@mail.gmail.com/T/#
Fixes: 288c90224eec ("Bluetooth: Enable all supported LE PHY by default")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
---

diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
index 9b239ce96fa45..2462796a512a5 100644
--- a/drivers/bluetooth/btintel.c
+++ b/drivers/bluetooth/btintel.c
@@ -2787,6 +2787,9 @@ static int btintel_setup_combined(struct hci_dev *hdev)
 			set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED,
 				&hdev->quirks);
 
+			/* These variants don't seem to support LE Coded PHY */
+			set_bit(HCI_QUIRK_BROKEN_LE_CODED, &hdev->quirks);
+
 			/* Setup MSFT Extension support */
 			btintel_set_msft_opcode(hdev, ver.hw_variant);
 
@@ -2858,6 +2861,9 @@ static int btintel_setup_combined(struct hci_dev *hdev)
 		 */
 		set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
 
+		/* These variants don't seem to support LE Coded PHY */
+		set_bit(HCI_QUIRK_BROKEN_LE_CODED, &hdev->quirks);
+
 		/* Set Valid LE States quirk */
 		set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
 
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index c58425d4c592c..87d92accc26ea 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -319,6 +319,16 @@ enum {
 	 * This quirk must be set before hci_register_dev is called.
 	 */
 	HCI_QUIRK_USE_MSFT_EXT_ADDRESS_FILTER,
+
+	/*
+	 * When this quirk is set, LE Coded PHY shall not be used. This is
+	 * required for some Intel controllers which erroneously claim to
+	 * support it but it causes problems with extended scanning.
+	 *
+	 * This quirk can be set before hci_register_dev is called or
+	 * during the hdev->setup vendor callback.
+	 */
+	HCI_QUIRK_BROKEN_LE_CODED,
 };
 
 /* HCI device flags */
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 6e2988b11f998..e6359f7346f1f 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1817,7 +1817,9 @@ void hci_conn_del_sysfs(struct hci_conn *conn);
 #define scan_2m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_2M) || \
 		      ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_2M))
 
-#define le_coded_capable(dev) (((dev)->le_features[1] & HCI_LE_PHY_CODED))
+#define le_coded_capable(dev) (((dev)->le_features[1] & HCI_LE_PHY_CODED) && \
+			       !test_bit(HCI_QUIRK_BROKEN_LE_CODED, \
+					 &(dev)->quirks))
 
 #define scan_coded(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_CODED) || \
 			 ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_CODED))
diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index 0cb7808171983..9b93653c61973 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -4668,7 +4668,10 @@ static const struct {
 			 "advertised, but not supported."),
 	HCI_QUIRK_BROKEN(SET_RPA_TIMEOUT,
 			 "HCI LE Set Random Private Address Timeout command is "
-			 "advertised, but not supported.")
+			 "advertised, but not supported."),
+	HCI_QUIRK_BROKEN(LE_CODED,
+			 "HCI LE Coded PHY feature bit is set, "
+			 "but its usage is not supported.")
 };
 
 /* This function handles hdev setup stage: