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Bluetooth: Add hook for driver to prevent wake from suspend

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Let drivers have a hook to disable configuring scanning during suspend.
Drivers should use the device_may_wakeup function call to determine
whether hci should be configured for wakeup.

For example, an implementation for btusb may look like the following:

  bool btusb_prevent_wake(struct hci_dev *hdev)
  {
        struct btusb_data *data = hci_get_drvdata(hdev);
        return !device_may_wakeup(&data->udev->dev);
  }

Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Reviewed-by: Alain Michaud <alainm@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Abhishek Pandit-Subedi 2020-05-12 19:19:26 -07:00 committed by Marcel Holtmann
parent 0d2c9825e4
commit 81dafad53c
2 changed files with 5 additions and 2 deletions
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1
include/net/bluetooth/hci_core.h
View File

@ -503,6 +503,7 @@ struct hci_dev {
int (*set_diag)(struct hci_dev *hdev, bool enable);
int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
void (*cmd_timeout)(struct hci_dev *hdev);
bool (*prevent_wake)(struct hci_dev *hdev);
};
#define HCI_PHY_HANDLE(handle) (handle & 0xff)

6
net/bluetooth/hci_core.c
View File

@ -3350,8 +3350,10 @@ static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action,
*/
ret = hci_change_suspend_state(hdev, BT_SUSPEND_DISCONNECT);
/* Only configure whitelist if disconnect succeeded */
if (!ret)
/* Only configure whitelist if disconnect succeeded and wake
* isn't being prevented.
*/
if (!ret && !(hdev->prevent_wake && hdev->prevent_wake(hdev)))
ret = hci_change_suspend_state(hdev,
BT_SUSPEND_CONFIGURE_WAKE);
} else if (action == PM_POST_SUSPEND) {