From: Juergen Gross jgross@suse.com
The backport of upstream patch 25da4618af240fbec61 ("xen/events: don't unmask an event channel when an eoi is pending") introduced a regression for stable kernels 5.10 and older: setting IRQ affinity for IRQs related to interdomain events would no longer work, as moving the IRQ to its new cpu was not included in the irq_ack callback for those events.
Fix that by adding the needed call.
Note that kernels 5.11 and later don't need the explicit moving of the IRQ to the target cpu in the irq_ack callback, due to a rework of the affinity setting in kernel 5.11.
Signed-off-by: Juergen Gross jgross@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/xen/events/events_base.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -1780,7 +1780,7 @@ static void lateeoi_ack_dynirq(struct ir
if (VALID_EVTCHN(evtchn)) { do_mask(info, EVT_MASK_REASON_EOI_PENDING); - event_handler_exit(info); + ack_dynirq(data); } }
@@ -1791,7 +1791,7 @@ static void lateeoi_mask_ack_dynirq(stru
if (VALID_EVTCHN(evtchn)) { do_mask(info, EVT_MASK_REASON_EXPLICIT); - event_handler_exit(info); + ack_dynirq(data); } }