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Message-ID: <5e363318-c6e4-4874-8026-7940b434d583@linaro.org>
Date: Wed, 24 Apr 2024 06:31:50 +0200
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Subject: Re: [PATCH v6 1/2] Bluetooth: qca: Fix BT enable failure for QCA6390
To: quic_zijuhu <quic_zijuhu@quicinc.com>, 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>
 <8ae32009-5f5e-49a1-88a1-e330f0614f60@quicinc.com>
From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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In-Reply-To: <8ae32009-5f5e-49a1-88a1-e330f0614f60@quicinc.com>
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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@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.

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.

Best regards,
Krzysztof