On 4/24/2024 9:52 PM, Bartosz Golaszewski wrote:
> On Wed, 24 Apr 2024 at 15:49, Luiz Augusto von Dentz
> <luiz.dentz@xxxxxxxxx> wrote:
>>
>> Hi Wren,
>>
>> On Wed, Apr 24, 2024 at 1:04 AM Wren Turkal <wt@xxxxxxxxxxxxxxxx> wrote:
>>>
>>> On 4/23/24 9:31 PM, Krzysztof Kozlowski wrote:
>>>> On 24/04/2024 06:18, quic_zijuhu wrote:
>>>>> On 4/24/2024 12:10 PM, Krzysztof Kozlowski wrote:
>>>>>> On 24/04/2024 06:07, quic_zijuhu wrote:
>>>>>>> On 4/24/2024 12:06 PM, Krzysztof Kozlowski wrote:
>>>>>>>> On 24/04/2024 02:46, Zijun Hu wrote:
>>>>>>>>> Commit 56d074d26c58 ("Bluetooth: hci_qca: don't use IS_ERR_OR_NULL()
>>>>>>>>> with gpiod_get_optional()") will cause below serious regression issue:
>>>>>>>>>
>>>>>>>>> BT can't be enabled any more after below steps:
>>>>>>>>> cold boot -> enable BT -> disable BT -> BT enable failure
>>>>>>>>> if property enable-gpios is not configured within DT|ACPI for QCA6390.
>>>>>>>>>
>>>>>>>>> The commit wrongly changes flag @power_ctrl_enabled set logic for this
>>>>>>>>> case as shown by its below code applet and causes this serious issue.
>>>>>>>>> qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
>>>>>>>>> GPIOD_OUT_LOW);
>>>>>>>>> - if (IS_ERR_OR_NULL(qcadev->bt_en)) {
>>>>>>>>> + if (IS_ERR(qcadev->bt_en)) {
>>>>>>>>> dev_warn(&serdev->dev, "failed to acquire enable gpio\n");
>>>>>>>>> power_ctrl_enabled = false;
>>>>>>>>> }
>>>>>>>>>
>>>>>>>>> Fixed by reverting the mentioned commit for QCA6390.
>>>>>>>>>
>>>>>>>>> Fixes: 56d074d26c58 ("Bluetooth: hci_qca: don't use IS_ERR_OR_NULL() with gpiod_get_optional()")
>>>>>>>>> Reported-by: Wren Turkal <wt@xxxxxxxxxxxxxxxx>
>>>>>>>>> Link: https://bugzilla.kernel.org/show_bug.cgi?id=218726
>>>>>>>>> Link: https://lore.kernel.org/linux-bluetooth/ea20bb9b-6b60-47fc-ae42-5eed918ad7b4@xxxxxxxxxxx/T/#m73d6a71d2f454bb03588c66f3ef7912274d37c6f
>>>>>>>>> Signed-off-by: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>
>>>>>>>>> Tested-by: Wren Turkal <wt@xxxxxxxxxxxxxxxx>
>>>>>>>>
>>>>>>>> No, Bartosz' patch should go.
>>>>>>>>
>>>>>>> what is Bartosz' patch.
>>>>>>
>>>>>> Srsly? You were Cc'ed on it. How many upstream patches on upstream
>>>>>> mailing lists do you receive that you lost track of them?
>>>>>>
>>>>> Bartosz' patch have basic serious mistook and logic error and have no
>>>>> any help for QCA6390, and it is not suitable regarding DTS usage.
>>>>
>>>> Really? Why you did not respond with comments then? Considering how
>>>> imprecise and vague you are in describing real issues, I have doubts in
>>>> your judgment here as well.
>>>
>>> Please slow down here. Zijun's patch works and Bartosz's patch does not.
>>> I don't think Zijun means any ill intent. I am replying to Bartosz's
>>> patch right now.
>>
>> Ok, that is great feedback, so I might be picking up the Zijun v7 set
>> if we don't find any major problems with it.
>>
>
> Luiz,
>
> Please consider my alternative[1] also tested by Wren. Zijun's usage
> of GPIO API is wrong.
>
why is it wrong ?
> Bart
>
> [1] https://lore.kernel.org/linux-bluetooth/CAMRc=MfJ1v3pAB+Wvu1ahJAUvDfk3OsN5nieA-EYgTXPwMzqyg@xxxxxxxxxxxxxx/T/#mbf94795476d21df0a24441470ce02def9d2970a7
