On Wed, Nov 04, 2020 at 07:58:07PM +0000, Ben Hutchings wrote:
> From: Juergen Gross <jgross@xxxxxxxx>
>
> commit 0891fb39ba67bd7ae023ea0d367297ffff010781 upstream.
>
> 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>
> Tested-by: Stefan Bader <stefan.bader@xxxxxxxxxxxxx>
> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
> Link: https://lore.kernel.org/r/20200930091614.13660-1-jgross@xxxxxxxx
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
> [bwh: Backported to 4.9: adjust context]
> Signed-off-by: Ben Hutchings <benh@xxxxxxxxxx>
> ---
> drivers/xen/events/events_base.c | 29 +++++++++++++++++++++--------
> 1 file changed, 21 insertions(+), 8 deletions(-)
This was in the 4.19.155 release, but I have added this to the other
kernels now too.
thanks,
greg k-h
