linux-kernel - [PATCH AUTOSEL 6.12 040/486] Bluetooth: Disable SCO support if READ_VOICE

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Message-Id: <20250505223922.2682012-40-sashal@kernel.org>
Date: Mon,  5 May 2025 18:31:56 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Pedro Nishiyama <nishiyama.pedro@...il.com>,
	Luiz Augusto von Dentz <luiz.von.dentz@...el.com>,
	Sasha Levin <sashal@...nel.org>,
	marcel@...tmann.org,
	johan.hedberg@...il.com,
	luiz.dentz@...il.com,
	linux-bluetooth@...r.kernel.org
Subject: [PATCH AUTOSEL 6.12 040/486] Bluetooth: Disable SCO support if READ_VOICE_SETTING is unsupported/broken

From: Pedro Nishiyama <nishiyama.pedro@...il.com>

[ Upstream commit 14d17c78a4b1660c443bae9d38c814edea506f62 ]

A SCO connection without the proper voice_setting can cause
the controller to lock up.

Signed-off-by: Pedro Nishiyama <nishiyama.pedro@...il.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/bluetooth/hci_event.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 96ad1b75d1c4d..97868d353219d 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -932,6 +932,9 @@ static u8 hci_cc_read_buffer_size(struct hci_dev *hdev, void *data,
 		hdev->sco_pkts = 8;
 	}
 
+	if (!read_voice_setting_capable(hdev))
+		hdev->sco_pkts = 0;
+
 	hdev->acl_cnt = hdev->acl_pkts;
 	hdev->sco_cnt = hdev->sco_pkts;
 
-- 
2.39.5