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

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Message-ID: <20240424152319.GD26307@linux-l9pv.suse>
Date: Wed, 24 Apr 2024 23:23:19 +0800
From: joeyli <jlee@...e.com>
To: Paul Menzel <pmenzel@...gen.mpg.de>
Cc: Chun-Yi Lee <joeyli.kernel@...il.com>,
	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
Subject: Re: [PATCH] Bluetooth: hci_sync: Using hci_cmd_sync_submit when
 removing Adv Monitor

Hi Paul,

Thanks for your review. I will follow your suggestion to update
my v2 patch. 

Joey Lee

On Wed, Apr 24, 2024 at 04:13:09PM +0200, Paul Menzel wrote:
> Dear Chun-Yi,
> 
> 
> Thank you for your patch.
> 
> Am 24.04.24 um 15:59 schrieb Lee, Chun-Yi:
> > From: Chun-Yi Lee <jlee@...e.com>
> 
> Please use imperative mood in the commit message summary:
> 
> Use hci_cmd_sync_submit() when removing Adv Monitor
> 
> > 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:
> 
> Maybe:
> 
> Since commit d883a4669a1de, present since Linux v6.4, the daemon bluetoothd
> logs the failure below, if the command MGMT_OP_REMOVE_ADV_MONITOR is sent
> when the controller is powered off.
> 
> > bluetoothd[20976]:
> > src/adapter.c:reset_adv_monitors_complete() Failed to reset Adv
> > Monitors: Failed>
> 
> Please make this one line and indent it with four spaces.
> 
> > Normally this situation is happened when the bluetoothd deamon
> 
> 1.  happen*s*
> 2.  d*ae*mon
> 
> > be started manually after system booting. Which means that
> 
> is started
> 
> > bluetoothd received MGMT_EV_INDEX_ADDED event after kernel
> 
> receive*s*
> 
> > runs hci_power_off().
> > 
> > Base on doc/mgmt-api.txt, the MGMT_OP_REMOVE_ADV_MONITOR command
> 
> Base*d*
> 
> > can be used when the controller is not powered. This patch changes
> 
> “This patch …” is redundant. Use: Change the code …
> 
> > the code in remove_adv_monitor() to use hci_cmd_sync_submit()
> > instead of hci_cmd_sync_queue().
> 
> Please document the test setup.
> 
> > 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>
> > ---
> >   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) {
> 
> 
> Kind regards,
> 
> Paul