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| author | Hans de Goede <hdegoede@redhat.com> | 2020-12-05 16:02:00 +0100 |
|---|---|---|
| committer | Johan Hedberg <johan.hedberg@intel.com> | 2020-12-07 16:01:50 +0100 |
| commit | d74e0ae7e03032b47b8631cc1e52a7ae1ce988c0 (patch) | |
| tree | 968959147163c0f03d08dbd663b23f7816ea9c0e /drivers/bluetooth | |
| parent | Bluetooth: Set missing suspend task bits (diff) | |
| download | linux-d74e0ae7e03032b47b8631cc1e52a7ae1ce988c0.tar.xz linux-d74e0ae7e03032b47b8631cc1e52a7ae1ce988c0.zip | |
Bluetooth: btusb: Fix detection of some fake CSR controllers with a bcdDevice val of 0x0134
Commit cde1a8a99287 ("Bluetooth: btusb: Fix and detect most of the
Chinese Bluetooth controllers") made the detection of fake controllers
more generic fixing it for much of the newer fakes / clones.
But this does not work for a fake CSR controller with a bcdDevice
value of 0x0134, which was correctly identified as fake before
this change.
Add an extra check for this special case, checking for a combination
of a bcdDevice value of 0x0134, together with a lmp_subver of 0x0c5c
and a hci_ver of BLUETOOTH_VER_2_0.
The chip inside this fake dongle is marked as with "clockwise cw6629d".
Fixes: cde1a8a99287 ("Bluetooth: btusb: Fix and detect most of the Chinese Bluetooth controllers")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/btusb.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index af47c02a2bbd..82ea7b230b17 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -1789,6 +1789,8 @@ static int btusb_setup_bcm92035(struct hci_dev *hdev) static int btusb_setup_csr(struct hci_dev *hdev) { + struct btusb_data *data = hci_get_drvdata(hdev); + u16 bcdDevice = le16_to_cpu(data->udev->descriptor.bcdDevice); struct hci_rp_read_local_version *rp; struct sk_buff *skb; bool is_fake = false; @@ -1858,6 +1860,12 @@ static int btusb_setup_csr(struct hci_dev *hdev) le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_4_0) is_fake = true; + /* Other clones which beat all the above checks */ + else if (bcdDevice == 0x0134 && + le16_to_cpu(rp->lmp_subver) == 0x0c5c && + le16_to_cpu(rp->hci_ver) == BLUETOOTH_VER_2_0) + is_fake = true; + if (is_fake) { bt_dev_warn(hdev, "CSR: Unbranded CSR clone detected; adding workarounds..."); |