Re: [PATCH] driver core: Make sure device detached from driver before deleting it

[jeffy <jeffy.chen@rock-chips.com>]

Hi Rafael,

On 10/18/2017 07:11 PM, jeffy wrote:
>>
> my board has these devices:
> spi master device->spi child device->spi based pwm->pwm_bl
>
> and i add a device link to the pwm and pwm_bl, and got a warning about
> the pwm not unbound:
sorry, it happens when i try to unbind the spi child device, and it's 
warning about the consumer(pwm_bl) not unbound.
>
> static void device_links_purge(struct device *dev)
> {
> ...
>          list_for_each_entry_safe_reverse(link, ln,
> &dev->links.consumers, s_node) {
>                  WARN_ON(link->status != DL_STATE_DORMANT &&
>                          link->status != DL_STATE_NONE); <-- warning here!
>                  __device_link_del(link);
>          }

and i've send a new patch to reorder the device_links_purge() and 
bus_remove_device, thanks again :)