Re: [PATCH] Bluetooth: qca: set power_ctrl_enabled on NULL returned by gpiod_get_optional()

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On 4/24/24 4:16 AM, Wren Turkal wrote:
On 4/24/24 2:04 AM, Bartosz Golaszewski wrote:
On Wed, 24 Apr 2024 07:07:05 +0200, Wren Turkal<wt@xxxxxxxxxxxxxxxx> said:
On 4/22/24 6:00 AM, Bartosz Golaszewski wrote:
From: Bartosz Golaszewski<bartosz.golaszewski@xxxxxxxxxx>

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.
Nack. This patch does fixes neither the disable/re-enable problem nor
the warm boot problem.

Zijun replied to this patch also with what I think is the proper
reasoning for why it doesn't fix my setup.

Indeed, I only addressed a single issue here and not the code under the
default: label of the switch case. Sorry.

Could you give the following diff a try?

I had a feeling that was what was going on. I'll give the patch a shot.

wt

Considering this patch is basically equivalent to patch 1/2 from Zijun, I am not surprised that is works similarly. I.e. on a cold boot, I can disable/re-enable bluetooth as many time as I want.

However, since this patch doesn't include the quirk fix from Zijun's patchset (patch 2/2), bluetooth fails to work after a warm boot.

@Zijun, this patch looks more idiomatic when I look at the surrounding code than your patch 1/2. Notice how it doesn't use the "else if" construct. It does the NULL test separately after checking for errors.

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