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Date: Mon, 15 Aug 2022 19:58:19 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Ying Hsu <yinghsu@...omium.org>, Alain Michaud <alainm@...omium.org>, Luiz Augusto von Dentz <luiz.von.dentz@...el.com>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.18 0500/1095] Bluetooth: Add default wakeup callback for HCI UART driver From: Ying Hsu <yinghsu@...omium.org> [ Upstream commit bee5395ced44c5a312348557eb2dfb0c2a7bfaa2 ] Bluetooth HCI devices indicate if they are able to wakeup in the wakeup callback since 'commit 4539ca67fe8e ("Bluetooth: Rename driver .prevent_wake to .wakeup")'. This patch adds a default wakeup callback for Bluetooth HCI UAR devices. It assumes Bluetooth HCI UART devices are wakeable for backward compatibility. For those who need a customized behavior, one can override it before calling hci_uart_register_device(). Fixes: 4539ca67fe8e ("Bluetooth: Rename driver .prevent_wake to .wakeup") Signed-off-by: Ying Hsu <yinghsu@...omium.org> Reviewed-by: Alain Michaud <alainm@...omium.org> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@...el.com> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/bluetooth/hci_serdev.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/bluetooth/hci_serdev.c b/drivers/bluetooth/hci_serdev.c index 4cda890ce647..c0e5f42ec6b7 100644 --- a/drivers/bluetooth/hci_serdev.c +++ b/drivers/bluetooth/hci_serdev.c @@ -231,6 +231,15 @@ static int hci_uart_setup(struct hci_dev *hdev) return 0; } +/* Check if the device is wakeable */ +static bool hci_uart_wakeup(struct hci_dev *hdev) +{ + /* HCI UART devices are assumed to be wakeable by default. + * Implement wakeup callback to override this behavior. + */ + return true; +} + /** hci_uart_write_wakeup - transmit buffer wakeup * @serdev: serial device * @@ -342,6 +351,8 @@ int hci_uart_register_device(struct hci_uart *hu, hdev->flush = hci_uart_flush; hdev->send = hci_uart_send_frame; hdev->setup = hci_uart_setup; + if (!hdev->wakeup) + hdev->wakeup = hci_uart_wakeup; SET_HCIDEV_DEV(hdev, &hu->serdev->dev); if (test_bit(HCI_UART_NO_SUSPEND_NOTIFIER, &hu->flags)) -- 2.35.1
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