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Mon, 29 Nov 2021 09:05:03 +0000 Received: from PNZPR01MB4415.INDPRD01.PROD.OUTLOOK.COM ([fe80::7ca6:9165:19ec:4cd7]) by PNZPR01MB4415.INDPRD01.PROD.OUTLOOK.COM ([fe80::7ca6:9165:19ec:4cd7%5]) with mapi id 15.20.4734.024; Mon, 29 Nov 2021 09:05:03 +0000 From: Aditya Garg To: Marcel Holtmann CC: Greg KH , Thorsten Leemhuis , Orlando Chamberlain , Daniel Winkler , Johan Hedberg , "linux-bluetooth@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Luiz Augusto von Dentz , "regressions@lists.linux.dev" , "sonnysasaka@chromium.org" , "stable@vger.kernel.org" Subject: [PATCH v4 2/2] btbcm: disable read tx power for affected Macs with the T2 Security chip Thread-Topic: [PATCH v4 2/2] btbcm: disable read tx power for affected Macs with the T2 Security chip Thread-Index: AQHX5QAxoEYALVxXVEOSEdj7Vglnwg== Date: Mon, 29 Nov 2021 09:05:02 +0000 Message-ID: <3EA0850B-7D40-4B21-85A5-B42C4CE8A942@live.com> References: <3B8E16FA-97BF-40E5-9149-BBC3E2A245FE@live.com> <52DEDC31-EEB2-4F39-905F-D5E3F2BBD6C0@live.com> <8919a36b-e485-500a-2722-529ffa0d2598@leemhuis.info> <20211117124717.12352-1-redecorating@protonmail.com> <40550C00-4EE5-480F-AFD4-A2ACA01F9DBB@live.com> <332a19f1-30f0-7058-ac18-c21cf78759bb@leemhuis.info> <287DE71A-2BF2-402D-98C8-24A9AEEE55CB@live.com> <42E2EC08-1D09-4DDE-B8B8-7855379C23C5@holtmann.org> <6ABF3770-A9E8-4DAF-A22D-DA7113F444F3@live.com> <6326984F-8428-4A3D-9734-1A408B9E82BB@live.com> In-Reply-To: <6326984F-8428-4A3D-9734-1A408B9E82BB@live.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-tmn: [IrC6vBjd1lUrYiE+VR/J/RB5z8zWWF4cHKlgUzz0n5VrhF4gKK4LJm/BSo+ajXv+] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: c0694153-d0a6-4ed7-e68f-08d9b3175463 x-ms-traffictypediagnostic: PN3PR01MB7822: x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 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 x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: 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 Content-Type: text/plain; charset="us-ascii" Content-ID: <19AAC14BF22538458AC73444F1429249@INDPRD01.PROD.OUTLOOK.COM> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: sct-15-20-3174-20-msonline-outlook-a1a1a.templateTenant X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: PNZPR01MB4415.INDPRD01.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-CrossTenant-Network-Message-Id: c0694153-d0a6-4ed7-e68f-08d9b3175463 X-MS-Exchange-CrossTenant-originalarrivaltime: 29 Nov 2021 09:05:02.9993 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-CrossTenant-rms-persistedconsumerorg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-Transport-CrossTenantHeadersStamped: PN3PR01MB7822 Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org From: Aditya Garg Some Macs with the T2 security chip had Bluetooth not working. To fix it we add DMI based quirks to disable querying of LE Tx power. Signed-off-by: Aditya Garg Reported-by: Orlando Chamberlain Link: https://lore.kernel.org/r/4970a940-211b-25d6-edab-21a815313954@protonmail.c= om Fixes: 7c395ea521e6 ("Bluetooth: Query LE tx power on startup") --- drivers/bluetooth/btbcm.c | 40 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/drivers/bluetooth/btbcm.c b/drivers/bluetooth/btbcm.c index e4182acee488c5..40f7c9c5cf0a5a 100644 --- a/drivers/bluetooth/btbcm.c +++ b/drivers/bluetooth/btbcm.c @@ -8,6 +8,7 @@ #include #include +#include #include #include @@ -343,9 +344,44 @@ static struct sk_buff *btbcm_read_usb_product(struct h= ci_dev *hdev) return skb; } +static const struct dmi_system_id disable_broken_read_transmit_power[] =3D= { + { + .matches =3D { + DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,1"), + }, + }, + { + .matches =3D { + DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,2"), + }, + }, + { + .matches =3D { + DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,4"), + }, + }, + { + .matches =3D { + DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "iMac20,1"), + }, + }, + { + .matches =3D { + DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "iMac20,2"), + }, + }, + { } +}; + static int btbcm_read_info(struct hci_dev *hdev) { struct sk_buff *skb; + const struct dmi_system_id *dmi_id; /* Read Verbose Config Version Info */ skb =3D btbcm_read_verbose_config(hdev); @@ -363,6 +399,10 @@ static int btbcm_read_info(struct hci_dev *hdev) bt_dev_info(hdev, "BCM: features 0x%2.2x", skb->data[1]); kfree_skb(skb); + /* Read DMI and disable broken Read LE Min/Max Tx Power */ + if (dmi_first_match(disable_broken_read_transmit_power)) + set_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks); + return 0; }=