From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33016C43334 for ; Tue, 19 Jul 2022 12:08:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238482AbiGSMIV (ORCPT ); Tue, 19 Jul 2022 08:08:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50352 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237808AbiGSMHr (ORCPT ); Tue, 19 Jul 2022 08:07:47 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 986FE4F19A; Tue, 19 Jul 2022 05:01:25 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id C00ED616F6; Tue, 19 Jul 2022 12:01:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A44F2C341C6; Tue, 19 Jul 2022 12:01:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1658232084; bh=5IEYN5foefB4K0Dyg0jaz4/QY7YbSg5VpEmxben9s0s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1mZt2ErMiOtwjETFdDPr0Q1knhwHIAcEfsGw+9S9kSG5nxfWSD21qWyyxwextKbty Gebl0CsNyJj7w7qBwTUJdtjAQ3DUEGt3ytvdNyJfe46BVIZ66pX5qrIOx9rNwCA90X Ov74MkmhVeQPuSqdTvMSYybaDtDN3udX8WB+Gb38= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Marc Zyngier , Stafford Horne , Sasha Levin Subject: [PATCH 4.19 37/48] irqchip: or1k-pic: Undefine mask_ack for level triggered hardware Date: Tue, 19 Jul 2022 13:54:14 +0200 Message-Id: <20220719114523.143796898@linuxfoundation.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220719114518.915546280@linuxfoundation.org> References: <20220719114518.915546280@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Stafford Horne [ Upstream commit 8520501346ed8d1c4a6dfa751cb57328a9c843f1 ] The mask_ack operation clears the interrupt by writing to the PICSR register. This we don't want for level triggered interrupt because it does not actually clear the interrupt on the source hardware. This was causing issues in qemu with multi core setups where interrupts would continue to fire even though they had been cleared in PICSR. Just remove the mask_ack operation. Acked-by: Marc Zyngier Signed-off-by: Stafford Horne Signed-off-by: Sasha Levin --- drivers/irqchip/irq-or1k-pic.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/irqchip/irq-or1k-pic.c b/drivers/irqchip/irq-or1k-pic.c index dd9d5d12fea2..05931fdedbb9 100644 --- a/drivers/irqchip/irq-or1k-pic.c +++ b/drivers/irqchip/irq-or1k-pic.c @@ -70,7 +70,6 @@ static struct or1k_pic_dev or1k_pic_level = { .name = "or1k-PIC-level", .irq_unmask = or1k_pic_unmask, .irq_mask = or1k_pic_mask, - .irq_mask_ack = or1k_pic_mask_ack, }, .handle = handle_level_irq, .flags = IRQ_LEVEL | IRQ_NOPROBE, -- 2.35.1