linux-kernel - Re: [PATCH] bluetooth: hci_event: don't print an error on vendor events

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Message-ID: <54a9ec41-300d-a0c7-eee1-9445ea200a5e@linaro.org>
Date:   Wed, 2 Mar 2022 19:18:57 +0000
From:   Caleb Connolly <caleb.connolly@...aro.org>
To:     Marcel Holtmann <marcel@...tmann.org>
Cc:     Johan Hedberg <johan.hedberg@...il.com>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        BlueZ <linux-bluetooth@...r.kernel.org>,
        "open list:NETWORKING [GENERAL]" <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH] bluetooth: hci_event: don't print an error on vendor
 events

Hi Marcel,

On 02/03/2022 19:16, Marcel Holtmann wrote:
> Hi Caleb,
> 
>> Since commit 3e54c5890c87 ("Bluetooth: hci_event: Use of a function table to handle HCI events"),
>> some devices see errors being printed for vendor events, e.g.
>>
>> [   75.806141] Bluetooth: hci0: setting up wcn399x
>> [   75.948311] Bluetooth: hci0: unexpected event 0xff length: 14 > 0
>> [   75.955552] Bluetooth: hci0: QCA Product ID   :0x0000000a
>> [   75.961369] Bluetooth: hci0: QCA SOC Version  :0x40010214
>> [   75.967417] Bluetooth: hci0: QCA ROM Version  :0x00000201
>> [   75.973363] Bluetooth: hci0: QCA Patch Version:0x00000001
>> [   76.000289] Bluetooth: hci0: QCA controller version 0x02140201
>> [   76.006727] Bluetooth: hci0: QCA Downloading qca/crbtfw21.tlv
>> [   76.986850] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.013574] Bluetooth: hci0: QCA Downloading qca/oneplus6/crnv21.bin
>> [   77.024302] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.032681] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.040674] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.049251] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.057997] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.066320] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.075065] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.083073] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.091250] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.099417] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.110166] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.118672] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.127449] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.137190] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.146192] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.154242] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.163183] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.171202] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.179364] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.187259] Bluetooth: hci0: unexpected event 0xff length: 3 > 0
>> [   77.198451] Bluetooth: hci0: QCA setup on UART is completed
>>
>> Use the quick-return path in hci_event_func() to avoid printing this
>> message for vendor events, this reverts to the previous behaviour which
>> didn't print an error for vendor events.
>>
>> Fixes: 3e54c5890c87 ("Bluetooth: hci_event: Use of a function table to handle HCI events")
>> Signed-off-by: Caleb Connolly <caleb.connolly@...aro.org>
>> ---
>> net/bluetooth/hci_event.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
> 
> patch has been applied to bluetooth-stable tree.
I spotted an issue with this patch - the vendor events are actually processed, it's the warning which is printed and not 
the error, I sent a v2 which properly disables the printing - you probably want that one instead, apologies for the 
noise/inconvenience.
> 
> Regards
> 
> Marcel
> 

-- 
Kind Regards,
Caleb (they/them)