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: 1530228 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=foss.st.com header.i=@foss.st.com header.a=rsa-sha256 header.s=selector1 header.b=UJaZ4mS1; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4HCpFW1kbMz9t0Y for ; Tue, 21 Sep 2021 01:22:07 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241389AbhITPXa (ORCPT ); Mon, 20 Sep 2021 11:23:30 -0400 Received: from mx07-00178001.pphosted.com ([185.132.182.106]:41856 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235845AbhITPX2 (ORCPT ); Mon, 20 Sep 2021 11:23:28 -0400 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 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.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; }