Re: hci_intel problem

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Hi Heikki,

Hi Loic,

Commit 765ea3abd116 ("Bluetooth: hci_intel: Retrieve host-wake IRQ")
seems to create a little regression:

[    2.734749] hci_intel INT33E1:00: No corresponding irq for gpio
[    2.736426] BUG: unable to handle kernel NULL pointer dereference at           (null)
[    2.738631] IP: [<ffffffff8132bee1>] desc_to_gpio+0x1/0x20

I think it's usually ill-advised to convert the gpio descriptors to
numbers unless there is a real need for it. Maybe you can just fix the
dev_info() back to way it was.


Thanks for the catch, I'm going to fix this and only display the desc address per your advice.

Root cause is the null pointer deref of the reset desc in:
desc_to_gpio(idev->reset)

However I already test this value earlier in the function with:

idev->reset = devm_gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(idev->reset)) {
        dev_err(&pdev->dev, "Unable to retrieve gpio\n");
        return PTR_ERR(idev->reset);
}

Problem is that devm_gpiod_get_optional can return either a ERR_PTR or NULL pointer.
I don't manage the NULL case, need to fix it as well.

Regards,
Loic
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