linux-kernel - Re: [PATCH] Bluetooth: qca: set power_ctrl_enabled on NULL returned by gpiod_get

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Date: Wed, 24 Apr 2024 21:30:34 +0800
From: quic_zijuhu <quic_zijuhu@...cinc.com>
To: Wren Turkal <wt@...guintechs.org>, Bartosz Golaszewski <brgl@...ev.pl>
CC: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        <linux-bluetooth@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Marcel
 Holtmann <marcel@...tmann.org>,
        Luiz Augusto von Dentz
	<luiz.dentz@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH] Bluetooth: qca: set power_ctrl_enabled on NULL returned
 by gpiod_get_optional()

On 4/24/2024 9:26 PM, Wren Turkal wrote:
> On 4/24/24 6:12 AM, quic_zijuhu wrote:
>> On 4/24/2024 8:27 PM, Bartosz Golaszewski wrote:
>>> On Wed, Apr 24, 2024 at 2:24 PM Wren Turkal <wt@...guintechs.org> wrote:
>>>>>>>
>>>>>>> That's OK, we have the first part right. Let's now see if we can
>>>>>>> reuse
>>>>>>> patch 2/2 from Zijun.
>>>>>>
>>>>>> I'm compiling it right now. Be back soon.
>>>>>>
>>>>>
>>>>> Well I doubt it's correct as it removed Krzysztof's fix which looks
>>>>> right. If I were to guess I'd say we need some mix of both.
>>>>
>>>> Patch 2/2 remove K's fix? I thought only 1/2 did that.
>>>>
>>>> To be specific, I have applied your patch and Zijun's 2/2 only.
>>>>
>>>
>>> No, patch 1/2 from Zijun reverted my changes. Patch 2/2 removes
>>> Krzysztof's changes and replaces them with a different if else. This
>>> patch is a better alternative to Zijun's patch 1/2. For 2/2, I'll let
>>> Krzysztof handle it.
>>>
>> do you really realize what do you talk about?
>> do you really listen what do @Wren says?
>>
>> he says that my patch 2/2 is right based on several verification results.
> 
> she, not he
> 
>> BTW, my 2/2 fix don't have anything about DTS usage.
> 
> I think the problem with your 2/2 patch is that it removes the
> conditional bailing if the device is shutdown or not open.
> 
> Maybe this patch instead?
> 
> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
> index 2f7ae38d85eb..fcac44ae7898 100644
> --- a/drivers/bluetooth/hci_qca.c
> +++ b/drivers/bluetooth/hci_qca.c
> @@ -2456,6 +2456,10 @@ static void qca_serdev_shutdown(struct device *dev)
>                     !test_bit(HCI_RUNNING, &hdev->flags))
>                         return;
> 
> +               if (test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP,
> &hdev->quirks) ||
> +                   hci_dev_test_flag(hdev, HCI_SETUP))
> +                       return;
> +
>                 serdev_device_write_flush(serdev);
>                 ret = serdev_device_write_buf(serdev, ibs_wake_cmd,
>                                               sizeof(ibs_wake_cmd));
> 
>> he maybe be a DTS expert but not BT from his present fix history for
>> bluetooth system.
> 
> 
Hi Wren,
i think i don't need to care about why wrong condition cause wrong results.