Commit d9ab9011 authored Apr 12, 2021 by Juergen Gross Committed by Greg Kroah-Hartman Apr 16, 2021

xen/events: fix setting irq affinity



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>

parent 61de25de

drivers/xen/events/events_base.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -1782,7 +1782,7 @@ static void lateeoi_ack_dynirq(struct irq_data *data)

		if (VALID_EVTCHN(evtchn)) {
		do_mask(info, EVT_MASK_REASON_EOI_PENDING);
		event_handler_exit(info);
		ack_dynirq(data);
		}
		}

		@@ -1793,7 +1793,7 @@ static void lateeoi_mask_ack_dynirq(struct irq_data *data)

		if (VALID_EVTCHN(evtchn)) {
		do_mask(info, EVT_MASK_REASON_EXPLICIT);
		event_handler_exit(info);
		ack_dynirq(data);
		}
		}