linux-kernel - Re: [PATCH] Bluetooth: hci_sync: Using hci_cmd_sync

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Date: Wed, 24 Apr 2024 16:02:37 +0200
From: Takashi Iwai <tiwai@...e.de>
To: "Lee, Chun-Yi" <joeyli.kernel@...il.com>
Cc: Luiz Augusto von Dentz <luiz.von.dentz@...el.com>,
	Manish Mandlik <mmandlik@...gle.com>,
	Archie Pusaka <apusaka@...omium.org>,
	Miao-chen Chou <mcchou@...omium.org>,
	linux-kernel@...r.kernel.org,
	linux-bluetooth@...r.kernel.org,
	Chun-Yi Lee <jlee@...e.com>
Subject: Re: [PATCH] Bluetooth: hci_sync: Using hci_cmd_sync_submit when removing Adv Monitor

On Wed, 24 Apr 2024 15:59:03 +0200,
Lee, Chun-Yi wrote:
> 
> From: Chun-Yi Lee <jlee@...e.com>
> 
> Since the d883a4669a1de be introduced in v6.4, bluetooth daemon
> got the following failed message of MGMT_OP_REMOVE_ADV_MONITOR
> command when controller is power-off:
> 
> bluetoothd[20976]:
> src/adapter.c:reset_adv_monitors_complete() Failed to reset Adv
> Monitors: Failed>
> 
> Normally this situation is happened when the bluetoothd deamon
> be started manually after system booting. Which means that
> bluetoothd received MGMT_EV_INDEX_ADDED event after kernel
> runs hci_power_off().
> 
> Base on doc/mgmt-api.txt, the MGMT_OP_REMOVE_ADV_MONITOR command
> can be used when the controller is not powered. This patch changes
> the code in remove_adv_monitor() to use hci_cmd_sync_submit()
> instead of hci_cmd_sync_queue().
> 
> Fixes: d883a4669a1de ("Bluetooth: hci_sync: Only allow hci_cmd_sync_queue if running")
> Cc: Luiz Augusto von Dentz <luiz.von.dentz@...el.com>
> Cc: Manish Mandlik <mmandlik@...gle.com>
> Cc: Archie Pusaka <apusaka@...omium.org>
> Cc: Miao-chen Chou <mcchou@...omium.org>
> Signed-off-by: Chun-Yi Lee <jlee@...e.com>

Is it a same issue tracked in
  https://github.com/bluez/bluez/issues/809
??


thanks,

Takashi

> ---
>  net/bluetooth/mgmt.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
> index 32ed6e9245a3..21962969411d 100644
> --- a/net/bluetooth/mgmt.c
> +++ b/net/bluetooth/mgmt.c
> @@ -5475,7 +5475,7 @@ static int remove_adv_monitor(struct sock *sk, struct hci_dev *hdev,
>  		goto unlock;
>  	}
>  
> -	err = hci_cmd_sync_queue(hdev, mgmt_remove_adv_monitor_sync, cmd,
> +	err = hci_cmd_sync_submit(hdev, mgmt_remove_adv_monitor_sync, cmd,
>  				 mgmt_remove_adv_monitor_complete);
>  
>  	if (err) {
> -- 
> 2.35.3
> 
>