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 X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=BAYES_00,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 81CE9C433E9 for ; Wed, 10 Mar 2021 11:35:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4245B64FE4 for ; Wed, 10 Mar 2021 11:35:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231424AbhCJLem (ORCPT ); Wed, 10 Mar 2021 06:34:42 -0500 Received: from mail-wm1-f48.google.com ([209.85.128.48]:52390 "EHLO mail-wm1-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230270AbhCJLeQ (ORCPT ); Wed, 10 Mar 2021 06:34:16 -0500 Received: by mail-wm1-f48.google.com with SMTP id n22so6895307wmc.2; Wed, 10 Mar 2021 03:34:15 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=7J7s2ULlckxPGV45ObvNHeMFlnciPOBmL4sFeKxQRrY=; b=f+hF+pFH0HAizt2JQ2xgYBt5+SCWy5rWFtjiPaAHluZDlhNTVAFfW3YyvrG8WtjjkE gzybpQUkYL9piVr/2mU8hhKJfTZitAxv6ju4K+sFKPUm80F90AocMyXQVBJl//tG9rjA JGwrnkuE7P9ZEQJHQ3koboVUHoezYIlEl8gsjKo4Gm3vZ+8R3fEGWDCxvFZZiL8xRu3E JppUwYvQCEhXuqFpAKeIbupK7tFUySZgLLJV1uKiQTJj9etpe0kDz4VUHLu4o3GtwaeG Rg3rfIYd5sZxtIYtCdV19hBiCEZJPJoIFClAfNsT5AWndbShOEnZtRaVblkDoLRnGKYn 832w== X-Gm-Message-State: AOAM530ywGmQCXDobx4UaQCGDsEFT/pGvcCVMahMEHRVWyB0meaU1qU0 pkelFlQl5+I4e6c8nsAR+Go= X-Google-Smtp-Source: ABdhPJykSDTXQb6rMzAJxlIEs15qvYEmGaFG3pm37E2tlVeGACX4zqvLUH6j+7SC5v6ZH9AFK3lxiA== X-Received: by 2002:a7b:ce19:: with SMTP id m25mr2938803wmc.74.1615376055056; Wed, 10 Mar 2021 03:34:15 -0800 (PST) Received: from liuwe-devbox-debian-v2 ([51.145.34.42]) by smtp.gmail.com with ESMTPSA id m3sm8770402wmc.48.2021.03.10.03.34.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 10 Mar 2021 03:34:14 -0800 (PST) Date: Wed, 10 Mar 2021 11:34:13 +0000 From: Wei Liu To: Thomas Gleixner Cc: LKML , Frederic Weisbecker , Sebastian Andrzej Siewior , "Ahmed S. Darwish" , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Lorenzo Pieralisi , Rob Herring , Bjorn Helgaas , linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, Peter Zijlstra , Denis Kirjanov , "David S. Miller" , Jakub Kicinski , netdev@vger.kernel.org, ath9k-devel@qca.qualcomm.com, Kalle Valo , linux-wireless@vger.kernel.org, Chas Williams <3chas3@gmail.com>, linux-atm-general@lists.sourceforge.net, Stefan Richter , linux1394-devel@lists.sourceforge.net Subject: Re: [patch 12/14] PCI: hv: Use tasklet_disable_in_atomic() Message-ID: <20210310113413.cuvmnrd3vhyhzi4c@liuwe-devbox-debian-v2> References: <20210309084203.995862150@linutronix.de> <20210309084242.516519290@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210309084242.516519290@linutronix.de> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 09, 2021 at 09:42:15AM +0100, Thomas Gleixner wrote: > From: Sebastian Andrzej Siewior > > The hv_compose_msi_msg() callback in irq_chip::irq_compose_msi_msg is > invoked via irq_chip_compose_msi_msg(), which itself is always invoked from > atomic contexts from the guts of the interrupt core code. > > There is no way to change this w/o rewriting the whole driver, so use > tasklet_disable_in_atomic() which allows to make tasklet_disable() > sleepable once the remaining atomic users are addressed. > > Signed-off-by: Sebastian Andrzej Siewior > Signed-off-by: Thomas Gleixner Acked-by: Wei Liu