From patchwork Thu Apr 15 14:47:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 422414 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 96275C433ED for ; Thu, 15 Apr 2021 14:54:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 33877613F4 for ; Thu, 15 Apr 2021 14:54:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234183AbhDOOy0 (ORCPT ); Thu, 15 Apr 2021 10:54:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:39522 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234136AbhDOOwi (ORCPT ); Thu, 15 Apr 2021 10:52:38 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B2B98613CD; Thu, 15 Apr 2021 14:52:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1618498333; bh=kQqduttTBrndpbO+HeobweYb1pI7czrzBHj1JX/4t68=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sRwHaliLck4Fd1Xv9tesdZLmmdj3Wo6fy7CjHe5kxWoyfZKHycAilj9n1wmhEO0Lg 5E75VXSdzYz7ZqEcS0kbUNmbuf0irtNYjNl8eJVnWBcP+47rKXCvfktknB/nip0YsA b9DZdDmVPMlnlfrqcMhqjg7UADi6LlbfB+D704Ww= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg Kroah-Hartman , Juergen Gross Subject: [PATCH 4.9 47/47] xen/events: fix setting irq affinity Date: Thu, 15 Apr 2021 16:47:39 +0200 Message-Id: <20210415144414.964377772@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210415144413.487943796@linuxfoundation.org> References: <20210415144413.487943796@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Juergen Gross 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 Signed-off-by: Greg Kroah-Hartman --- 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); } }