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From:   bugzilla-daemon@kernel.org
To:     linux-bluetooth@vger.kernel.org
Subject: [Bug 60824] [PATCH][regression] Cambridge Silicon Radio, Ltd
 Bluetooth Dongle unusable
Date:   Thu, 20 Apr 2023 17:35:43 +0000
Message-ID: <bug-60824-62941-SqdUgpH0Xp@https.bugzilla.kernel.org/>
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https://bugzilla.kernel.org/show_bug.cgi?id=3D60824

--- Comment #270 from Vitaliy Ognev (vitaliy.ognev@gmail.com) ---
Got mine somehow working (scanning, pairing) by applying following patch:

diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index 5a6aa1627791..b27fe44ec41e 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -3605,7 +3605,7 @@ static const struct hci_init_stage hci_init2[] =3D {
        /* HCI_OP_READ_INQ_RSP_TX_POWER */
        HCI_INIT(hci_read_inq_rsp_tx_power_sync),
        /* HCI_OP_READ_LOCAL_EXT_FEATURES */
-       HCI_INIT(hci_read_local_ext_features_1_sync),
+       // HCI_INIT(hci_read_local_ext_features_1_sync),
        /* HCI_OP_WRITE_AUTH_ENABLE */
        HCI_INIT(hci_write_auth_enable_sync),
        {}


still with lot of errors in dmesg. My dongle having "Hoco." label on it and
looks like following in lsusb:

Bus 001 Device 005: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Don=
gle
(HCI mode)
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass          224 Wireless
  bDeviceSubClass         1 Radio Frequency
  bDeviceProtocol         1 Bluetooth
  bMaxPacketSize0        64
  idVendor           0x0a12 Cambridge Silicon Radio, Ltd
  idProduct          0x0001 Bluetooth Dongle (HCI mode)
  bcdDevice           88.91
  iManufacturer           0=20
  iProduct                2 USB2.0-BT
  iSerial                 0=20
  bNumConfigurations      1

--=20
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