linux-kernel - [PATCH] Bluetooth: hci_sync: fix BR/EDR wakeup bug

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Message-Id: <20231127090545.117162-1-15013537245@163.com>
Date:   Mon, 27 Nov 2023 17:05:45 +0800
From:   15013537245@....com
To:     marcel@...tmann.org, johan.hedberg@...il.com, luiz.dentz@...il.com
Cc:     linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
        "clancy.shang" <clancy.shang@...ctel.com>
Subject: [PATCH] Bluetooth: hci_sync: fix BR/EDR wakeup bug

From: "clancy.shang" <clancy.shang@...ctel.com>

Steam deck in suspending state, but bt controller send hci
mode change event to host. cause Steam Deck can't into sleep.

Signed-off-by: clancy.shang <clancy.shang@...ctel.com>
---
 net/bluetooth/hci_sync.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index a15ab0b874a9..a26a58cb2c38 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -3800,12 +3800,14 @@ static int hci_set_event_mask_sync(struct hci_dev *hdev)
 	if (lmp_bredr_capable(hdev)) {
 		events[4] |= 0x01; /* Flow Specification Complete */
 
-		/* Don't set Disconnect Complete when suspended as that
-		 * would wakeup the host when disconnecting due to
-		 * suspend.
+		/* Don't set Disconnect Complete and mode change when
+		 * suspended as that would wakeup the host when disconnecting
+		 * due to suspend.
 		 */
-		if (hdev->suspended)
+		if (hdev->suspended) {
 			events[0] &= 0xef;
+			events[2] &= 0xf7;
+		}
 	} else {
 		/* Use a different default for LE-only devices */
 		memset(events, 0, sizeof(events));
-- 
2.25.1