From patchwork Thu Sep 12 08:30:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinjie Ruan X-Patchwork-Id: 13801722 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A84E1EE645F for ; Thu, 12 Sep 2024 08:24:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=N9b4bN6r/HQCM1w8d5lCdiSEkbVWoXfqbQ1He6x+B5U=; b=svxGkdsmLUwGUgihYxTLZfQmIk FAXBoFqCrJpmGrsPnIZ3PS83rig1+OkEv/Vwj8VmCRJ60O+P3i+nS+mwduxDlKesWKTiMnbd2FKeQ PyuRpGKZM/KRnMfNpwwGwpD05B526s0SW+4QVFT55RAI2TVpOo0oy/UktRurbidol1BV2IY6/NnCS 27d6vdM91A7dM/IniKracCUvA8KC9TN08Co5uQ3O/HaNC569xobLRDCkl6qba2XYmlzJDvej9UxtM 2sNBuDRZ411PwP2i8tKDqpTddvF1Atj0Um7BcUhe4FOJ9x3li/efdl/mIpMqplcd1/Fi/9m7TvAmF 7xcSBSAA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sof7U-0000000CMnX-1BZ5; Thu, 12 Sep 2024 08:24:04 +0000 Received: from szxga04-in.huawei.com ([45.249.212.190]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sof4r-0000000CM4z-3z2m for linux-arm-kernel@lists.infradead.org; Thu, 12 Sep 2024 08:21:25 +0000 Received: from mail.maildlp.com (unknown [172.19.163.17]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4X49PY5WvQz20nnp; Thu, 12 Sep 2024 16:21:05 +0800 (CST) Received: from kwepemh500013.china.huawei.com (unknown [7.202.181.146]) by mail.maildlp.com (Postfix) with ESMTPS id B04AB1A0188; Thu, 12 Sep 2024 16:21:12 +0800 (CST) Received: from huawei.com (10.90.53.73) by kwepemh500013.china.huawei.com (7.202.181.146) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Thu, 12 Sep 2024 16:21:11 +0800 From: Jinjie Ruan To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , CC: Subject: [PATCH v2 0/5] drm: Use IRQF_NO_AUTOEN flag in request_irq() Date: Thu, 12 Sep 2024 16:30:15 +0800 Message-ID: <20240912083020.3720233-1-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [10.90.53.73] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemh500013.china.huawei.com (7.202.181.146) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240912_012122_284420_E986B8D6 X-CRM114-Status: UNSURE ( 7.50 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org As commit cbe16f35bee6 ("genirq: Add IRQF_NO_AUTOEN for request_irq/nmi()") said, reqeust_irq() and then disable_irq() is unsafe. In the small time gap between request_irq() and disable_irq(), interrupts can still come. IRQF_NO_AUTOEN flag can be used by drivers to request_irq(). It prevents the automatic enabling of the requested interrupt in the same safe way. With that the usage can be simplified and corrected. Compile-tested only. Changes in v2: - Correct the commit subject. - Add reviewed-by. Jinjie Ruan (5): drm/imx: Use IRQF_NO_AUTOEN flag in request_irq() drm/imx/dcss: Use IRQF_NO_AUTOEN flag in request_irq() drm/imx/ipuv3: Use IRQF_NO_AUTOEN flag in request_irq() drm/tegra: dpaux: Use IRQF_NO_AUTOEN flag in request_irq() drm/msm/adreno: Use IRQF_NO_AUTOEN flag in request_irq() drivers/gpu/drm/imx/dcss/dcss-crtc.c | 6 ++---- drivers/gpu/drm/imx/dcss/dcss-dtg.c | 4 +--- drivers/gpu/drm/imx/ipuv3/ipuv3-crtc.c | 6 ++---- drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 4 +--- drivers/gpu/drm/tegra/dpaux.c | 4 +--- 5 files changed, 7 insertions(+), 17 deletions(-)