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Date:   Fri,  8 Dec 2023 13:07:06 -0800
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Message-ID: <20231208130705.kernel.v1.1.Ic5024b3da99b11e39c247a5b8ba44876c18880a0@changeid>
Subject: [kernel PATCH v1] Bluetooth: btmtksdio: clear BTMTKSDIO_BT_WAKE_ENABLED
 after resume
From:   Zhengping Jiang <jiangzp@google.com>
To:     linux-bluetooth@vger.kernel.org, marcel@holtmann.org,
        luiz.dentz@gmail.com
Cc:     chromeos-bluetooth-upstreaming@chromium.org,
        Zhengping Jiang <jiangzp@google.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Johan Hedberg <johan.hedberg@gmail.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Paolo Abeni <pabeni@redhat.com>,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-mediatek@lists.infradead.org, netdev@vger.kernel.org
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Precedence: bulk

Always clear BTMTKSDIO_BT_WAKE_ENABLED bit after resume. When Bluetooth
does not generate interrupts, the bit will not be cleared and causes
premature wakeup.

Fixes: 4ed924fc122f ("Bluetooth: btmtksdio: enable bluetooth wakeup in system suspend")
Signed-off-by: Zhengping Jiang <jiangzp@google.com>
---

Changes in v1:
- Clear BTMTKSDIO_BT_WAKE_ENABLED flag on resume

 drivers/bluetooth/btmtksdio.c    | 10 ++++++++++
 include/net/bluetooth/hci_core.h |  1 +
 net/bluetooth/hci_sync.c         |  2 ++
 3 files changed, 13 insertions(+)

diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c
index ff4868c83cd8..8f00b71573c8 100644
--- a/drivers/bluetooth/btmtksdio.c
+++ b/drivers/bluetooth/btmtksdio.c
@@ -1296,6 +1296,15 @@ static bool btmtksdio_sdio_inband_wakeup(struct hci_dev *hdev)
 	return device_may_wakeup(bdev->dev);
 }
 
+static void btmtksdio_disable_bt_wakeup(struct hci_dev *hdev)
+{
+	struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+
+	if (!bdev)
+		return;
+	clear_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state);
+}
+
 static bool btmtksdio_sdio_wakeup(struct hci_dev *hdev)
 {
 	struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
@@ -1363,6 +1372,7 @@ static int btmtksdio_probe(struct sdio_func *func,
 	hdev->shutdown = btmtksdio_shutdown;
 	hdev->send     = btmtksdio_send_frame;
 	hdev->wakeup   = btmtksdio_sdio_wakeup;
+	hdev->clear_wakeup = btmtksdio_disable_bt_wakeup;
 	/*
 	 * If SDIO controller supports wake on Bluetooth, sending a wakeon
 	 * command is not necessary.
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 0c1754f416bd..4bbd55335269 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -672,6 +672,7 @@ struct hci_dev {
 	int (*get_codec_config_data)(struct hci_dev *hdev, __u8 type,
 				     struct bt_codec *codec, __u8 *vnd_len,
 				     __u8 **vnd_data);
+	void (*clear_wakeup)(struct hci_dev *hdev);
 };
 
 #define HCI_PHY_HANDLE(handle)	(handle & 0xff)
diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index 3563a90ed2ac..6c4d5ce40524 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -5947,6 +5947,8 @@ int hci_resume_sync(struct hci_dev *hdev)
 		return 0;
 
 	hdev->suspended = false;
+	if (hdev->clear_wakeup)
+		hdev->clear_wakeup(hdev);
 
 	/* Restore event mask */
 	hci_set_event_mask_sync(hdev);
-- 
2.43.0.472.g3155946c3a-goog