linux-kernel - Re: [PATCH v2] Bluetooth: qca: set power_ctrl_enabled on NULL returned by gpiod_get

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Date: Wed, 24 Apr 2024 21:22:37 +0800
From: quic_zijuhu <quic_zijuhu@...cinc.com>
To: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Wren Turkal
	<wt@...guintechs.org>
CC: Bartosz Golaszewski <brgl@...ev.pl>,
        Marcel Holtmann
	<marcel@...tmann.org>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <linux-bluetooth@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] Bluetooth: qca: set power_ctrl_enabled on NULL
 returned by gpiod_get_optional()

On 4/24/2024 9:18 PM, Bartosz Golaszewski wrote:
> On Wed, 24 Apr 2024 at 15:10, Wren Turkal <wt@...guintechs.org> wrote:
>>
>> On 4/24/24 5:29 AM, Bartosz Golaszewski wrote:
>>> From: Bartosz Golaszewski<bartosz.golaszewski@...aro.org>
>>>
>>> Any return value from gpiod_get_optional() other than a pointer to a
>>> GPIO descriptor or a NULL-pointer is an error and the driver should
>>> abort probing. That being said: commit 56d074d26c58 ("Bluetooth: hci_qca:
>>> don't use IS_ERR_OR_NULL() with gpiod_get_optional()") no longer sets
>>> power_ctrl_enabled on NULL-pointer returned by
>>> devm_gpiod_get_optional(). Restore this behavior but bail-out on errors.
>>> While at it: also bail-out on error returned when trying to get the
>>> "swctrl" GPIO.
>>>
>>> Reported-by: Wren Turkal<wt@...guintechs.org>
>>> Reported-by: Zijun Hu<quic_zijuhu@...cinc.com>
>>> Closes:https://lore.kernel.org/linux-bluetooth/1713449192-25926-2-git-send-email-quic_zijuhu@quicinc.com/
>>> Fixes: 56d074d26c58 ("Bluetooth: hci_qca: don't use IS_ERR_OR_NULL() with gpiod_get_optional()")
>>> Reviewed-by: Krzysztof Kozlowski<krzysztof.kozlowski@...aro.org>
>>> Signed-off-by: Bartosz Golaszewski<bartosz.golaszewski@...aro.org>
>>
>> Tested-by: "Wren Turkal" <wt@...guintechs.org>
>>
>>
>> Like this?
> 
> Yes, awesome, thanks.
> 
> This is how reviewing works too in the kernel, look at what Krzysztof
> did under v1, he just wrote:
> 
> Reviewed-by: Krzysztof Kozlowski<krzysztof.kozlowski@...aro.org>
> 
v1 have obvious something wrong as i pointed and verified.
so i think it is not suitable to attach v1's review-by tag to v2 anyway.

> And mailing list tools will pick it up.
> 
> Bartosz