Re: [PATCH 0/2] Xen: Use a dedicated pointer for IRQ data

[Sergei Temerkhanov <s.temerkhanov@xxxxxxxxx>]

On Fri, Aug 21, 2020 at 11:07 PM Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
> Fiddling in irqchip is wrong to begin with.
>
> int irq_set_handler_data(unsigned int irq, void *data);
> static inline void *irq_get_handler_data(unsigned int irq)
> static inline void *irq_data_get_irq_handler_data(struct irq_data *d)
>
> are accessors to handler_data. Am I missing something?

Well, the patches in question are meant to solve the issue discussed
in this thread:
https://lists.xenproject.org/archives/html/xen-devel/2020-08/msg00957.html
All in all, the Dom0 kernel crashes due to a conflict between Xen and
GPIO pinctrl code both trying to use hander data to track some private
data. The patch series adds a separate pointer along with a few
functions for Xen. There may be other ideas on how to resolve this
issue though
Here are web archive :-) links:
https://lists.xenproject.org/archives/html/xen-devel/2020-08/msg01144.html
https://lists.xenproject.org/archives/html/xen-devel/2020-08/msg01145.html

Regards,
Sergey