From patchwork Mon Sep 20 15:21:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alain Volmat X-Patchwork-Id: 12505695 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=-18.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 C38D4C433F5 for ; Mon, 20 Sep 2021 15:24:09 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 8E06F61077 for ; Mon, 20 Sep 2021 15:24:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 8E06F61077 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=foss.st.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: 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: List-Owner; bh=7uuhRhyiMIZiZ0fTw45VGD3SGBKsH0rQken4Ay0zwp0=; b=nq+ufMTAbnJa3J nkjpb59l6T9BcbWydpBNSfWOuf1Fv2BtRZTb1ZGzdeOWMr7tOzhJCWZ2IzcQ57wNtFqpdcX6Wjauw ai2xWH8JctZ4Wkn3pT3a6hY3yS+WCRkdsiUAgUjCRfHYADRcCjEBxo/VJcP0RIhxGIxNeIl/zPeFy 95hjxoxlSkJUcdpg34q5s1/pbA3NFBXU/9f6wtXc5tNBe9uyLBH1IMfcaVSUgLIU5wcAgHiSB+j1M i2zlVBMYf65o6mtl8hT+nfOnHKRXUMYljPWBULArUZw5h6MKqpcS7wEo4q2rm+91Zc6p1UtKd6jwB YYRKAKP7VHYr7WgC995Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mSL7m-002Blf-8S; Mon, 20 Sep 2021 15:22:30 +0000 Received: from mx07-00178001.pphosted.com ([185.132.182.106]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mSL7E-002BhP-Gb for linux-arm-kernel@lists.infradead.org; Mon, 20 Sep 2021 15:21:59 +0000 Received: from pps.filterd (m0241204.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 18K8jYXh030008; Mon, 20 Sep 2021 17:21:47 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=selector1; bh=37QNl9P5De/Y/cw7XinD/wLqFsoYqybLsQYdh8u8mXs=; b=UJaZ4mS1npHgpNWt5XpcM/g/IYpfQu0OrtJYgIHbpPd1lRiKEj8ZApFgc3+gM7jvUUYd 1VeSVXLgwF/xcypXf+KW+ATjePSofgYn+FAWSjRBoR/QH4gfjnCbM4w02+qNwxy3MmP3 1xjkfLR0Le5//wWPY5TGuErWwFUzsd5SFkRovuPEM0fkY8bCqSMBKiKrfh8E/5Tmdi1O fHiJehLUMX9Oy7D0lWFEFVPFKpU40Mx1YMLizrHTBn9V6xfZk4Paf3xn4blVpYIKHL73 Oru/JmUIbyfjfVq+zSMKNGAEm+wuGCHCevWG+J6mD2PC7hfDNjL9JvZoPelAgYesgP8D BQ== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 3b6q2shv5y-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 20 Sep 2021 17:21:46 +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 7987F100038; Mon, 20 Sep 2021 17:21:46 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag2node2.st.com [10.75.127.5]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 7233722F7B7; Mon, 20 Sep 2021 17:21:46 +0200 (CEST) Received: from localhost (10.75.127.44) by SFHDAG2NODE2.st.com (10.75.127.5) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Mon, 20 Sep 2021 17:21:46 +0200 From: Alain Volmat To: , CC: , , , , , , , Subject: [PATCH 2/4] i2c: stm32f7: recover the bus on access timeout Date: Mon, 20 Sep 2021 17:21:30 +0200 Message-ID: <1632151292-18503-3-git-send-email-alain.volmat@foss.st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1632151292-18503-1-git-send-email-alain.volmat@foss.st.com> References: <1632151292-18503-1-git-send-email-alain.volmat@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.44] X-ClientProxiedBy: SFHDAG1NODE3.st.com (10.75.127.3) To SFHDAG2NODE2.st.com (10.75.127.5) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.182.1,Aquarius:18.0.790,Hydra:6.0.391,FMLib:17.0.607.475 definitions=2021-09-20_07,2021-09-20_01,2020-04-07_01 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210920_082156_905488_71374D9B X-CRM114-Status: GOOD ( 14.81 ) 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 When getting an access timeout, ensure that the bus is in a proper state prior to returning the error. Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver") Signed-off-by: Alain Volmat Reviewed-by: Pierre-Yves MORDRET --- drivers/i2c/busses/i2c-stm32f7.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c index ed977b6f7ab6..ad3459a3bc5e 100644 --- a/drivers/i2c/busses/i2c-stm32f7.c +++ b/drivers/i2c/busses/i2c-stm32f7.c @@ -1712,6 +1712,7 @@ static int stm32f7_i2c_xfer(struct i2c_adapter *i2c_adap, i2c_dev->msg->addr); if (i2c_dev->use_dma) dmaengine_terminate_all(dma->chan_using); + stm32f7_i2c_wait_free_bus(i2c_dev); ret = -ETIMEDOUT; } @@ -1769,6 +1770,7 @@ static int stm32f7_i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr, dev_dbg(dev, "Access to slave 0x%x timed out\n", f7_msg->addr); if (i2c_dev->use_dma) dmaengine_terminate_all(dma->chan_using); + stm32f7_i2c_wait_free_bus(i2c_dev); ret = -ETIMEDOUT; goto pm_free; }