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=-13.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,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 D1DE7C433DF for ; Mon, 10 Aug 2020 07:13:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A9CCD20734 for ; Mon, 10 Aug 2020 07:13:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="GxbelMg7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726453AbgHJHNS (ORCPT ); Mon, 10 Aug 2020 03:13:18 -0400 Received: from mx07-00178001.pphosted.com ([185.132.182.106]:23244 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726010AbgHJHNE (ORCPT ); Mon, 10 Aug 2020 03:13:04 -0400 Received: from pps.filterd (m0046668.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 07A71xAU026940; Mon, 10 Aug 2020 09:12:52 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=STMicroelectronics; bh=OzGXro9iLMCh57TZ72fiBMjYtaaITfNfK4CpTLhCHL8=; b=GxbelMg77eE+iGw57FqJ0I3/VGoj4sif7HFku7TxpIfnfVKfo47AXy6UXMTVQDTduHJv FiFA8PGYelUB3PP+puiYf7TZh1ECpyC+dvt2cWCXK+NiOV0J4FCZU6eODQREfSU2zOvZ oba/aNuY8LfCV4PA618qumws20PcK82+mTlo7Y4AOmY3nrFUAa/G8G90W3ofQNsQ7ZnA 9+bohqOpCstnCv5SoOc48Ue/ajLmMb3o683hJ6wJqkPj9nw7v8gMbnc1Iry+NfumIwua gYGXtv2JlZXBL4eZPnaydaq+vNQCo++LIxnk3h8AonJiFm7AH0r2jyOL9UyzqWhmFFnR FA== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 32smf968j4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 10 Aug 2020 09:12:52 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id CC9AB10002A; Mon, 10 Aug 2020 09:12:50 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag3node2.st.com [10.75.127.8]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id BB8872AD9EB; Mon, 10 Aug 2020 09:12:50 +0200 (CEST) Received: from localhost (10.75.127.46) by SFHDAG3NODE2.st.com (10.75.127.8) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 10 Aug 2020 09:12:50 +0200 From: Alain Volmat To: , CC: , , , , , , , Subject: [PATCH v2 1/5] spi: stm32h7: fix race condition at end of transfer Date: Mon, 10 Aug 2020 09:12:34 +0200 Message-ID: <1597043558-29668-2-git-send-email-alain.volmat@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1597043558-29668-1-git-send-email-alain.volmat@st.com> References: <1597043558-29668-1-git-send-email-alain.volmat@st.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.75.127.46] X-ClientProxiedBy: SFHDAG2NODE2.st.com (10.75.127.5) To SFHDAG3NODE2.st.com (10.75.127.8) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-08-10_02:2020-08-06,2020-08-10 signatures=0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Antonio Borneo The caller of stm32_spi_transfer_one(), spi_transfer_one_message(), is waiting for us to call spi_finalize_current_transfer() and will eventually schedule a new transfer, if available. We should guarantee that the spi controller is really available before calling spi_finalize_current_transfer(). Move the call to spi_finalize_current_transfer() _after_ the call to stm32_spi_disable(). Signed-off-by: Antonio Borneo Signed-off-by: Alain Volmat --- v2: identical to v1 drivers/spi/spi-stm32.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index 4a21feae0103..814a3ec3b8ad 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -971,8 +971,8 @@ static irqreturn_t stm32h7_spi_irq_thread(int irq, void *dev_id) spin_unlock_irqrestore(&spi->lock, flags); if (end) { - spi_finalize_current_transfer(master); stm32h7_spi_disable(spi); + spi_finalize_current_transfer(master); } return IRQ_HANDLED; -- 2.7.4