[PATCH] Bluetooth: core: Fix missing power_on work cancel on HCI close

[PATCH] Bluetooth: core: Fix missing power_on work cancel on HCI close

[Vasyl Vavrychuk]

Move power_on work cancel to hci_dev_close_sync to ensure that power_on
work is canceled after HCI interface down, power off, rfkill, etc.

For example, if

    hciconfig hci0 down

is done early enough during boot, it may run before power_on work.
Then, power_on work will actually bring up interface despite above
hciconfig command.

Signed-off-by: Vasyl Vavrychuk <vasyl.vavrychuk@opensynergy.com>
---
 net/bluetooth/hci_core.c | 2 --
 net/bluetooth/hci_sync.c | 1 +
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index b4782a6c1025..ad4f4ab0afca 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2675,8 +2675,6 @@ void hci_unregister_dev(struct hci_dev *hdev)
 	list_del(&hdev->list);
 	write_unlock(&hci_dev_list_lock);
 
-	cancel_work_sync(&hdev->power_on);
-
 	hci_cmd_sync_clear(hdev);
 
 	if (!test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks))
diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index 8f4c5698913d..c5b0dbfc0379 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -4058,6 +4058,7 @@ int hci_dev_close_sync(struct hci_dev *hdev)
 
 	bt_dev_dbg(hdev, "");
 
+	cancel_work_sync(&hdev->power_on);
 	cancel_delayed_work(&hdev->power_off);
 	cancel_delayed_work(&hdev->ncmd_timer);
 
-- 
2.30.2

Re: [PATCH] Bluetooth: core: Fix missing power_on work cancel on HCI close

[patchwork-bot+bluetooth]

Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Marcel Holtmann <marcel@holtmann.org>:

On Tue, 26 Apr 2022 11:18:23 +0300 you wrote:
> Move power_on work cancel to hci_dev_close_sync to ensure that power_on
> work is canceled after HCI interface down, power off, rfkill, etc.
> 
> For example, if
> 
>     hciconfig hci0 down
> 
> [...]

Here is the summary with links:
  - Bluetooth: core: Fix missing power_on work cancel on HCI close
    https://git.kernel.org/bluetooth/bluetooth-next/c/2d866d8ec36f

You are awesome, thank you!
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