diff mbox series

[5.10,25/25] xen/events: fix setting irq affinity

Message ID	20210415144413.948817193@linuxfoundation.org
State	New
Headers	show Return-Path: <stable-owner@kernel.org> From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Juergen Gross <jgross@suse.com> Subject: [PATCH 5.10 25/25] xen/events: fix setting irq affinity Date: Thu, 15 Apr 2021 16:48:19 +0200 Message-Id: <20210415144413.948817193@linuxfoundation.org> In-Reply-To: <20210415144413.165663182@linuxfoundation.org> References: <20210415144413.165663182@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	None \| expand [5.10,02/25] gfs2: Flag a withdraw if init_threads() fails [5.10,03/25] KVM: arm64: Hide system instruction access to Trace registers [5.10,04/25] KVM: arm64: Disable guest access to trace filter controls [5.10,05/25] drm/imx: imx-ldb: fix out of bounds array access warning [5.10,06/25] gfs2: report "already frozen/thawed" errors [5.10,07/25] ftrace: Check if pages were allocated before calling free_pages() [5.10,08/25] tools/kvm_stat: Add restart delay [5.10,09/25] drm/tegra: dc: Dont set PLL clock to 0Hz [5.10,10/25] gpu: host1x: Use different lock classes for each client [5.10,11/25] XArray: Fix splitting to non-zero orders [5.10,13/25] block: only update parent bi_status when bio fail [5.10,14/25] radix tree test suite: Register the main thread with the RCU library [5.10,15/25] idr test suite: Take RCU read lock in idr_find_test_1 [5.10,16/25] idr test suite: Create anchor before launching throbber [5.10,17/25] null_blk: fix command timeout completion handling [5.10,18/25] io_uring: dont mark S_ISBLK async work as unbounded [5.10,19/25] riscv,entry: fix misaligned base for excp_vect_table [5.10,20/25] block: dont ignore REQ_NOWAIT for direct IO [5.10,21/25] netfilter: x_tables: fix compat match/target pad out-of-bound write [5.10,22/25] perf map: Tighten snprintf() string precision to pass gcc check on some 32-bit arches [5.10,23/25] net: sfp: relax bitrate-derived mode check [5.10,24/25] net: sfp: cope with SFPs that set both LOS normal and LOS inverted [5.10,25/25] xen/events: fix setting irq affinity

Commit Message

Greg Kroah-Hartman April 15, 2021, 2:48 p.m. UTC

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(-)

diff mbox series

Patch

--- a/drivers/xen/events/events_base.c
+++ b/drivers/xen/events/events_base.c
@@ -1809,7 +1809,7 @@  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);
 	}
 }
 
@@ -1820,7 +1820,7 @@  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);
 	}
 }