Re: [PATCH v6 1/2] Bluetooth: qca: Fix BT enable failure for QCA6390

[Greg KH <gregkh@linuxfoundation.org>]

On Wed, Apr 24, 2024 at 08:46:41AM +0800, 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>
> ---
> Changes:
> V3 -> V6: Correct code stype and title and commit message
> V1 -> V3: Don't revert the whole wrong commit but focus on impacted device 

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
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