Re: [PATCH] driver core: Respect all error codes from dev_pm_domain_attach()

[Ulf Hansson]

On 15 May 2018 at 06:46, Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
> On Thu, Apr 26, 2018 at 10:53:06AM +0200, Ulf Hansson wrote:
>> The limitation of being able to check only for -EPROBE_DEFER from
>> dev_pm_domain_attach() has been removed. Hence let's respect all error
>> codes and bail out accordingly.
>>
>
> AFAICS this patch causes all drivers/devices to fail instantiating
> if dev_pm_domain_set() is called in the device initialization path.
> That seems to be a systemic problem, since dev_pm_domain_set() must
> only be called for unbound devices.
>
> In practice, I see the problem when trying to boot beagle or overo
> with qemu (the Linaro version). Of course, that doesn't mean much
> because that is not real hardware. However, I am not surprised that
> all devices instantiated through, for example, omap_device_build_from_dt()
> fail to instantiate. Instrumentation confirms that dev_pm_domain_set()
> is called prior to platform_drv_probe().

Your observations are correct, my bad! Others have also reported the problems.

This should solve it:
https://patchwork.kernel.org/patch/10398597/

[...]

Kind regards
Uffe