From patchwork Thu Nov 12 22:10:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Kaiser X-Patchwork-Id: 11901859 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2F23A16C0 for ; Thu, 12 Nov 2020 22:10:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1640622227 for ; Thu, 12 Nov 2020 22:10:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727412AbgKLWKh (ORCPT ); Thu, 12 Nov 2020 17:10:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46186 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727384AbgKLWKh (ORCPT ); Thu, 12 Nov 2020 17:10:37 -0500 Received: from viti.kaiser.cx (viti.kaiser.cx [IPv6:2a01:238:43fe:e600:cd0c:bd4a:7a3:8e9f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 05D65C0613D4; Thu, 12 Nov 2020 14:10:36 -0800 (PST) Received: from dslb-094-219-035-190.094.219.pools.vodafone-ip.de ([94.219.35.190] helo=martin-debian-2.paytec.ch) by viti.kaiser.cx with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.89) (envelope-from ) id 1kdKnN-0003X9-Op; Thu, 12 Nov 2020 23:10:21 +0100 From: Martin Kaiser To: Bjorn Helgaas , Thomas Gleixner , Ley Foon Tan , Lorenzo Pieralisi , Nicolas Saenz Julienne , Jingoo Han , Gustavo Pimentel , Toan Le , Florian Fainelli Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Martin Kaiser Subject: [PATCH v3 1/3] PCI: altera-msi: remove chained IRQ handler and data in one go Date: Thu, 12 Nov 2020 23:10:08 +0100 Message-Id: <20201112221010.9473-1-martin@kaiser.cx> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20201108191140.23227-1-martin@kaiser.cx> References: <20201108191140.23227-1-martin@kaiser.cx> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Call irq_set_chained_handler_and_data() to clear the chained handler and the handler's data under irq_desc->lock. See also 2cf5a03cb29d ("PCI/keystone: Fix race in installing chained IRQ handler"). Signed-off-by: Martin Kaiser --- v3: - rewrite the commit message again. this is no race condition if we remove the interrupt handler. sorry for the noise. v2: - rewrite the commit message to clarify that this is a bugfix drivers/pci/controller/pcie-altera-msi.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/pci/controller/pcie-altera-msi.c b/drivers/pci/controller/pcie-altera-msi.c index e1636f7714ca..42691dd8ebef 100644 --- a/drivers/pci/controller/pcie-altera-msi.c +++ b/drivers/pci/controller/pcie-altera-msi.c @@ -204,8 +204,7 @@ static int altera_msi_remove(struct platform_device *pdev) struct altera_msi *msi = platform_get_drvdata(pdev); msi_writel(msi, 0, MSI_INTMASK); - irq_set_chained_handler(msi->irq, NULL); - irq_set_handler_data(msi->irq, NULL); + irq_set_chained_handler_and_data(msi->irq, NULL, NULL); altera_free_domains(msi);