Re: [PATCH] irqchip/mbigen: Fix incorrect null pointer check

[chenjun (AM)]

在 2024/2/13 18:09, Thomas Gleixner 写道:
> On Mon, Jan 29 2024 at 21:00, Chen Jun wrote:
> 
> That's not about an incorrect NULL pointer check. That's about using a
> function which is guaranteed to return NULL on your platform, no?
> 
>> bus_get_dev_root(&platform_bus_type) always returns NULL.
> 
> Lacks an explanation why this always returns NULL.
> 

Thank you for the reply.

bus_get_dev_root returns sp->dev_root set in subsys_register.
And subsys_register is not called by platform_bus_init.

So, for platform_bus_type, bus_get_dev_root always returns NULL.

> Thanks
> 
>          tglx
> 
>