Re: [PATCH v1 1/2] Revert "Bluetooth: hci_qca: don't use IS_ERR_OR_NULL() with gpiod_get_optional()"

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On 4/21/24 2:40 AM, quic_zijuhu wrote:
On 4/21/2024 3:14 PM, Wren Turkal wrote:
On 4/18/24 3:42 PM, Bartosz Golaszewski wrote:
1) do you meet the case that EPROBE_DEFER is returned ?

It doesn't matter. It's about correct usage of a programming interface.

In case you are not aware, this apparent correct usage of the
programming interface breaks real hardware. As a kernel user with this
problem, I am just wondering if we expect a fix to land before v6.9 lands.

If we can't find the a fix that has "correct usage of the programming
interface" before 6.9 closes out, would we be able to revert this change
considering that it causes a real userspace regression in that the BT on
some laptops simply don't work now? I guess I am asking if this
theoretical correction more important than breaking actual currently
supported hardware?

Real users like me are hurt by this. In my case, I am using a laptop
that was shipped in 2020 with Linux by Dell that included working BT
support. I now have broken BT hardware that is barely usable at all.

And as a kernel user, I thought the kernel had a no regression policy.
Granted, I don't know the specific details of how it works. Does that
policy include support of widely deployed hardware?

Just so you know, I am just trying to understand what to expect.

Also, I want to offer help. Is there anything I can do to help y'all
reach a resolution?

Thanks,
wt
per QCA6390. we have correct usage of a programming interface.

as my reply at below link, we don't need to take care bout
Bartosz's question since it is not relevant with this issue.

https://lore.kernel.org/all/01677a26-ea91-47cc-bdc4-283cf313d8e4@xxxxxxxxxxx/

Ack. Thx for the pointer.

I will admit, I am finding it a bit difficult to follow the discussion. As such, I have no opinion on who's right. I just want to help reach a conclusion that includes my hardware working.

wt
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