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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT 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 46640C83012 for ; Thu, 26 Nov 2020 21:07:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F084D221F8 for ; Thu, 26 Nov 2020 21:07:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="EJgU0yrf" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388521AbgKZVGr (ORCPT ); Thu, 26 Nov 2020 16:06:47 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42796 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388418AbgKZVGr (ORCPT ); Thu, 26 Nov 2020 16:06:47 -0500 Received: from mail-pf1-x441.google.com (mail-pf1-x441.google.com [IPv6:2607:f8b0:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2765DC0613D4 for ; Thu, 26 Nov 2020 13:06:46 -0800 (PST) Received: by mail-pf1-x441.google.com with SMTP id b6so2607725pfp.7 for ; Thu, 26 Nov 2020 13:06:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Tgn2hTBqiW955JL5NPKA45JX/FzuG4XGgD1c5/FNO0E=; b=EJgU0yrfDUi8K8TBrpgjT/nsXFo2NQQXZN2x+vJPCyzkDxYqwcmziQyyjhr9ttVojI AonHYDAz2+W26V4stIv19k1UcMmylcC4/I9CgGet6RwL6Kyy2UAtfKTl0qfAIytXLqhX I80mt//amPrYAPJ30mKrzEQPvBJ7rmm1yEpGk/nEnef0VfU7s/1Qc42Z/Kl40xpDoJSd dESiphWO7uhj9Tb281SsmB4OmaJfa/D19zZLoG7bYC+c7eHkgt3LYYrudLSvRQDvTFIg OIkAC1WD33FWh0WsP8pEYguuVyKOJASEoFcHEDb+d5Lgd0MUj99UTtwvtWAFsePNQ3Z7 T1uA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Tgn2hTBqiW955JL5NPKA45JX/FzuG4XGgD1c5/FNO0E=; b=qOj6bTQiVHR41RfICSv230InunT+DOfjA/kErBtdMyfCTJjKFQKpMaMNz9e8FnGF/E nybFRcw2GDO67+xYrcx+zriU2oftV0FJBlC+Lt4zlsPoeAS3x64rLtHEIipVOEw3cMRy 483AaA+NQi2DNCureZVSDiDPl7oSeL7x0z+JygZwuySTB7i96a8pRxUk7UAqpolARIpd vHdPgh9+Ou/fSvCEbxkFOV3AY1QF1urjad827IDvEDj1WYlBTsOLBa83b5OKo9AuYoBC mZ/9bnTp4Wu8+b2pJU+4TRnwJsdIv+UNXniX7QFj8T7rt3Wa4bOkiORuSI0UxY2To0nS CUMw== X-Gm-Message-State: AOAM533W5VjIoYiK/rLEoJmjRGgMaz2a/J9l14Ly1vDXKPGIP490dJZ7 f5lrxyQjI6QeXspKzOxqDqG1Vw== X-Google-Smtp-Source: ABdhPJxxRX5T2XVObUhBwNopitD5QOQ5LaEDrJ75ibgn4vFqyaiYk50I+mOWW6AvrfKpk1GEYX69Jg== X-Received: by 2002:a63:3309:: with SMTP id z9mr3796396pgz.243.1606424805726; Thu, 26 Nov 2020 13:06:45 -0800 (PST) Received: from xps15.cg.shawcable.net (S0106889e681aac74.cg.shawcable.net. [68.147.0.187]) by smtp.gmail.com with ESMTPSA id c203sm5612676pfc.10.2020.11.26.13.06.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Nov 2020 13:06:45 -0800 (PST) From: Mathieu Poirier To: ohad@wizery.com, bjorn.andersson@linaro.org, robh+dt@kernel.org Cc: linux-remoteproc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, arnaud.pouliquen@st.com Subject: [PATCH v3 02/15] remoteproc: Re-check state in rproc_shutdown() Date: Thu, 26 Nov 2020 14:06:29 -0700 Message-Id: <20201126210642.897302-3-mathieu.poirier@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201126210642.897302-1-mathieu.poirier@linaro.org> References: <20201126210642.897302-1-mathieu.poirier@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The state of the remote processor may have changed between the time a call to rproc_shutdown() was made and the time it is executed. To avoid moving forward with an operation that may have been cancelled, recheck while holding the mutex. Cc: Signed-off-by: Mathieu Poirier Reviewed-by: Peng Fan Reviewed-by: Arnaud Pouliquen --- drivers/remoteproc/remoteproc_core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 46c2937ebea9..e8b901f34c91 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -1857,6 +1857,9 @@ void rproc_shutdown(struct rproc *rproc) return; } + if (rproc->state != RPROC_RUNNING) + goto out; + /* if the remote proc is still needed, bail out */ if (!atomic_dec_and_test(&rproc->power)) goto out; -- 2.25.1