For reference, the issue with the now backported patch was identified upstream (https://lkml.org/lkml/2020/9/30/352), and the following patch resolves it:
commit 0891fb39ba67bd7ae023ea0d367297ffff010781 Author: Juergen Gross <email address hidden> Date: Wed Sep 30 11:16:14 2020 +0200 xen/events: don't use chip_data for legacy IRQs
For reference, the issue with the now backported patch was identified upstream (https:/ /lkml.org/ lkml/2020/ 9/30/352), and the following patch resolves it:
commit 0891fb39ba67bd7 ae023ea0d367297 ffff010781
Author: Juergen Gross <email address hidden>
Date: Wed Sep 30 11:16:14 2020 +0200
xen/events: don't use chip_data for legacy IRQs