This is a note to let you know that I've just added the patch titled
Bluetooth: Clear suspend tasks on unregister
to the 5.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bluetooth-clear-suspend-tasks-on-unregister.patch
and it can be found in the queue-5.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit d288f7e7a1ca163e058c5c13047bdee46b38fa8f
Author: Abhishek Pandit-Subedi <abhishekpandit@xxxxxxxxxxxx>
Date: Mon Aug 31 09:51:27 2020 -0700
Bluetooth: Clear suspend tasks on unregister
[ Upstream commit 0e9952804ec9c8ba60f131225eab80634339f042 ]
While unregistering, make sure to clear the suspend tasks before
cancelling the work. If the unregister is called during resume from
suspend, this will unnecessarily add 2s to the resume time otherwise.
Fixes: 4e8c36c3b0d73d (Bluetooth: Fix suspend notifier race)
Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@xxxxxxxxxxxx>
Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 68bfe57b66250..efc0fe2b47dac 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3442,6 +3442,16 @@ void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
}
}
+static void hci_suspend_clear_tasks(struct hci_dev *hdev)
+{
+ int i;
+
+ for (i = 0; i < __SUSPEND_NUM_TASKS; i++)
+ clear_bit(i, hdev->suspend_tasks);
+
+ wake_up(&hdev->suspend_wait_q);
+}
+
static int hci_suspend_wait_event(struct hci_dev *hdev)
{
#define WAKE_COND \
@@ -3785,6 +3795,7 @@ void hci_unregister_dev(struct hci_dev *hdev)
cancel_work_sync(&hdev->power_on);
unregister_pm_notifier(&hdev->suspend_notifier);
+ hci_suspend_clear_tasks(hdev);
cancel_work_sync(&hdev->suspend_prepare);
hci_dev_do_close(hdev);
