Re: [PATCH] xen/events: don't use chip_data for legacy IRQs

[boris.ostrovsky@xxxxxxxxxx]

On 9/30/20 5:16 AM, Juergen Gross wrote:
> Since commit c330fb1ddc0a ("XEN uses irqdesc::irq_data_common::handler_data 
> to store a per interrupt XEN data pointer which contains XEN specific 
> information.")
> Xen is using the chip_data pointer for storing IRQ specific data. When
> running as a HVM domain this can result in problems for legacy IRQs, as
> those might use chip_data for their own purposes.
>
> Use a local array for this purpose in case of legacy IRQs, avoiding the
> double use.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: c330fb1ddc0a ("XEN uses irqdesc::irq_data_common::handler_data to 
> store a per interrupt XEN data pointer which contains XEN specific 
> information.")
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>


Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>