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| author | Sven Peter <sven@svenpeter.dev> | 2022-11-04 22:13:02 +0100 |
|---|---|---|
| committer | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2022-12-12 14:19:24 -0800 |
| commit | ffcb0a445ec2d5753751437706aa0a7ea8351099 (patch) | |
| tree | 48bfba906f7da84f0aec9425bb89e9761b41f9bd | |
| parent | 392fca352c7a95e2828d49e7500e26d0c87ca265 (diff) | |
| download | lwn-ffcb0a445ec2d5753751437706aa0a7ea8351099.tar.gz lwn-ffcb0a445ec2d5753751437706aa0a7ea8351099.zip | |
Bluetooth: Add quirk to disable MWS Transport Configuration
Broadcom 4378/4387 controllers found in Apple Silicon Macs claim to
support getting MWS Transport Layer Configuration,
< HCI Command: Read Local Supported... (0x04|0x0002) plen 0
> HCI Event: Command Complete (0x0e) plen 68
Read Local Supported Commands (0x04|0x0002) ncmd 1
Status: Success (0x00)
[...]
Get MWS Transport Layer Configuration (Octet 30 - Bit 3)]
[...]
, but then don't actually allow the required command:
> HCI Event: Command Complete (0x0e) plen 15
Get MWS Transport Layer Configuration (0x05|0x000c) ncmd 1
Status: Command Disallowed (0x0c)
Number of transports: 0
Baud rate list: 0 entries
00 00 00 00 00 00 00 00 00 00
Signed-off-by: Sven Peter <sven@svenpeter.dev>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
| -rw-r--r-- | include/net/bluetooth/hci.h | 10 | ||||
| -rw-r--r-- | include/net/bluetooth/hci_core.h | 3 | ||||
| -rw-r--r-- | net/bluetooth/hci_sync.c | 2 |
3 files changed, 14 insertions, 1 deletions
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h index 4cf6bc363e4f..8d773b042c85 100644 --- a/include/net/bluetooth/hci.h +++ b/include/net/bluetooth/hci.h @@ -284,6 +284,16 @@ enum { * during the hdev->setup vendor callback. */ HCI_QUIRK_BROKEN_EXT_SCAN, + + /* + * When this quirk is set, the HCI_OP_GET_MWS_TRANSPORT_CONFIG command is + * disabled. This is required for some Broadcom controllers which + * erroneously claim to support MWS Transport Layer Configuration. + * + * This quirk can be set before hci_register_dev is called or + * during the hdev->setup vendor callback. + */ + HCI_QUIRK_BROKEN_MWS_TRANSPORT_CONFIG, }; /* HCI device flags */ diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index 1113d74e1f9f..7254edfba4c9 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -1720,6 +1720,9 @@ void hci_conn_del_sysfs(struct hci_conn *conn); ((dev)->le_features[3] & HCI_LE_CIS_PERIPHERAL) #define bis_capable(dev) ((dev)->le_features[3] & HCI_LE_ISO_BROADCASTER) +#define mws_transport_config_capable(dev) (((dev)->commands[30] & 0x08) && \ + (!test_bit(HCI_QUIRK_BROKEN_MWS_TRANSPORT_CONFIG, &(dev)->quirks))) + /* ----- HCI protocols ----- */ #define HCI_PROTO_DEFER 0x01 diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c index 4debe205d4af..9e2d7e4b850c 100644 --- a/net/bluetooth/hci_sync.c +++ b/net/bluetooth/hci_sync.c @@ -4279,7 +4279,7 @@ static int hci_read_local_pairing_opts_sync(struct hci_dev *hdev) /* Get MWS transport configuration if the HCI command is supported */ static int hci_get_mws_transport_config_sync(struct hci_dev *hdev) { - if (!(hdev->commands[30] & 0x08)) + if (!mws_transport_config_capable(hdev)) return 0; return __hci_cmd_sync_status(hdev, HCI_OP_GET_MWS_TRANSPORT_CONFIG, |