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Message-ID: <8f6bc1a8-a1ec-45f1-a951-0ad5a9890cc2@quicinc.com>
Date: Sat, 4 May 2024 02:49:42 +0800
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Subject: Re: [PATCH v1] Bluetooth: qca: Fix BT enable failure again for
 QCA6390 after warm reboot
To: Krzysztof Kozlowski <krzk@kernel.org>, <luiz.dentz@gmail.com>,
        <luiz.von.dentz@intel.com>, <marcel@holtmann.org>
CC: <linux-bluetooth@vger.kernel.org>, <wt@penguintechs.org>,
        <regressions@lists.linux.dev>, <stable@vger.kernel.org>
References: <1714658761-15326-1-git-send-email-quic_zijuhu@quicinc.com>
 <5e5e869c-da12-4818-837e-55709f0c4db9@kernel.org>
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From: quic_zijuhu <quic_zijuhu@quicinc.com>
In-Reply-To: <5e5e869c-da12-4818-837e-55709f0c4db9@kernel.org>
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On 5/3/2024 6:16 PM, Krzysztof Kozlowski wrote:
> On 02/05/2024 16:06, Zijun Hu wrote:
>> Commit 272970be3dab ("Bluetooth: hci_qca: Fix driver shutdown on closed
>> serdev") will cause below regression issue:
>>
>> BT can't be enabled after below steps:
>> cold boot -> enable BT -> disable BT -> warm reboot -> BT enable failure
>> if property enable-gpios is not configured within DT|ACPI for QCA6390.
>>
>> The commit is to fix a use-after-free issue within qca_serdev_shutdown()
>> during reboot, but also introduces this regression issue regarding above
>> steps since the VSC is not sent to reset controller during warm reboot.
>>
>> Fixed by sending the VSC to reset controller within qca_serdev_shutdown()
>> once BT was ever enabled, and the use-after-free issue is also be fixed
>> by this change since serdev is still opened when send to serdev.
>>
>> Fixes: 272970be3dab ("Bluetooth: hci_qca: Fix driver shutdown on closed serdev")
>> Cc: stable@vger.kernel.org
>> Reported-by: Wren Turkal <wt@penguintechs.org>
>> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218726
>> Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
>> Tested-by: Wren Turkal <wt@penguintechs.org>
>> ---
>>  drivers/bluetooth/hci_qca.c | 5 ++---
> 
> I don't think this is v1. Version your patches properly and provide
> changelog.
> 
i sent it as v1 to start a new and clean discussion.
> I asked already *two times*:
> 1. On which kernel did you test it?
> 2. On which hardware did you test it?
> 
will provide such info within next commit message.
> I am not interested in any replies like "I wrote something on bugzilla".
> I am really fed up with your elusive, time-wasting replies, so be
> specific here.
> 
are there any other concerns about this patch itself?
> Best regards,
> Krzysztof
>