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Message-ID: <8ae32009-5f5e-49a1-88a1-e330f0614f60@quicinc.com>
Date: Wed, 24 Apr 2024 12:18:54 +0800
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Subject: Re: [PATCH v6 1/2] Bluetooth: qca: Fix BT enable failure for QCA6390
To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        <luiz.dentz@gmail.com>, <luiz.von.dentz@intel.com>,
        <marcel@holtmann.org>
CC: <linux-bluetooth@vger.kernel.org>, <bartosz.golaszewski@linaro.org>,
        <wt@penguintechs.org>, <regressions@lists.linux.dev>,
        <kernel@quicinc.com>
References: <1713919602-5812-1-git-send-email-quic_zijuhu@quicinc.com>
 <1713919602-5812-2-git-send-email-quic_zijuhu@quicinc.com>
 <349b27a5-d2d3-46f1-b002-44f81e0cedef@linaro.org>
 <e8cd122d-e342-45c2-b078-a4ca2d8dcfff@quicinc.com>
 <dfe18768-f6da-4c60-880d-deeae3c3b04d@linaro.org>
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From: quic_zijuhu <quic_zijuhu@quicinc.com>
In-Reply-To: <dfe18768-f6da-4c60-880d-deeae3c3b04d@linaro.org>
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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@penguintechs.org>
>>>> Link: https://bugzilla.kernel.org/show_bug.cgi?id=218726
>>>> Link: https://lore.kernel.org/linux-bluetooth/ea20bb9b-6b60-47fc-ae42-5eed918ad7b4@quicinc.com/T/#m73d6a71d2f454bb03588c66f3ef7912274d37c6f
>>>> Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
>>>> Tested-by: Wren Turkal <wt@penguintechs.org>
>>>
>>> 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.
if below link is Bartosz' patch
https://patchwork.kernel.org/project/bluetooth/patch/20240422130036.31856-1-brgl@bgdev.pl/


do you really code review for Bartosz' patch before give your
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

> Best regards,
> Krzysztof
>