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=-9.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 81A73C6377A for ; Tue, 20 Jul 2021 02:32:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 622E761186 for ; Tue, 20 Jul 2021 02:32:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236117AbhGTBuu (ORCPT ); Mon, 19 Jul 2021 21:50:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43786 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348840AbhGSXQw (ORCPT ); Mon, 19 Jul 2021 19:16:52 -0400 Received: from mail-pg1-x529.google.com (mail-pg1-x529.google.com [IPv6:2607:f8b0:4864:20::529]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4315BC061574; Mon, 19 Jul 2021 16:50:24 -0700 (PDT) Received: by mail-pg1-x529.google.com with SMTP id 37so20953059pgq.0; Mon, 19 Jul 2021 16:50:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=OWc8hqQQpNq22ewTu2Cne5FSxOLf7rSW/vePnOSRjJ4=; b=q8msN0xI4jxFBIgNFs30yYsMhOay4C/hsPBXdeze1/0ngvN7ZksrLKVS5fGOTo6qyK kfhDA9onlyhZjJhFchmmSYkIRC9eeahGVQ6jJm6tdE+wsfq94/G1P4fKD0SekqSUMhz+ 3FTR4EpkqXB8rFY1sZdB39K9Yl8pm8NGrehkFWgCmHrchncUvF/D+xCEZQGSeX/QWyZt D8TzotpRH1DvUoqASQrLHqrRqvSU8vSLsTP2IR2MiODbMzY33IBmh8qTVW1iwJpVCcRZ rIVmVd9GeWu6p0he5kDaDJh5iY/mMABLqCHG7RhKvDIubba9BfC53mHNwKID8VDzfihy tNGA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=OWc8hqQQpNq22ewTu2Cne5FSxOLf7rSW/vePnOSRjJ4=; b=ntaMB0R61y9PGooQdSqWNLPs1JrkH2h3oQoQhMeHxJHNGaqkQ0TulkoQB6ff2rcKBh j6fiIpg9zSxEo0Z/FQtOCQlaQ3AusA0YHK7IovARhEPF8kHDfcbpGq5PqB/8YUBxexpF 9S+J6XtLb0FNlbzLyqkEUQVbZ+t/SYQ+d7Djc8qKT1y2lqd6HfqENshj4bkhdyj9q14b Io2eVeNn1JgbkqL924OmW20iHZWw72BqahH03Qz37xTwBxedCv0Cgf6UTyCTpPo34Fdb YtVcEcE9Euu4AORoN+yFIMhRCWrneWBR9z1BJu+7Ysj/gwOaJmYF0gnGxA1v6X6wgnhw bMUQ== X-Gm-Message-State: AOAM533Lxy03dGztMmacDsiTtcBK19P/5J+Uce7hTjCNdDmmgADdr9WV sy8hnMYGLGB4g8gOeSTVhp0= X-Google-Smtp-Source: ABdhPJycgNRiFYQmS7TXzt8et/xrcIHB2RLODGj4JURwPu1gXgYo3rKqFp9De8ZGbDEboYDOC9bb0Q== X-Received: by 2002:a63:48f:: with SMTP id 137mr27964585pge.257.1626738623772; Mon, 19 Jul 2021 16:50:23 -0700 (PDT) Received: from [10.67.49.104] ([192.19.223.252]) by smtp.googlemail.com with ESMTPSA id x6sm25082950pgq.67.2021.07.19.16.50.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 19 Jul 2021 16:50:23 -0700 (PDT) Subject: Re: [PATCH 1/1] spi: spi-bcm2835: Fix deadlock To: alexandru.tachici@analog.com, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, broonie@kernel.org Cc: nuno.sa@analog.com, bootc@bootc.net, swarren@wwwdotorg.org, bcm-kernel-feedback-list@broadcom.com, rjui@broadcom.com, f.fainelli@gmail.com, nsaenz@kernel.org References: <20210716210245.13240-1-alexandru.tachici@analog.com> <20210716210245.13240-2-alexandru.tachici@analog.com> From: Florian Fainelli Message-ID: <77c67af2-e9fa-cc27-b44e-8c412b71cfc7@gmail.com> Date: Mon, 19 Jul 2021 16:50:21 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <20210716210245.13240-2-alexandru.tachici@analog.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org On 7/16/21 2:02 PM, alexandru.tachici@analog.com wrote: > From: Alexandru Tachici > > The bcm2835_spi_transfer_one function can create a deadlock > if it is called while another thread already has the > CCF lock. > > Signed-off-by: Alexandru Tachici > Fixes: f8043872e796 ("spi: add driver for BCM2835") Reviewed-by: Florian Fainelli -- Florian