From patchwork Fri Aug 7 13:21:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alain Volmat X-Patchwork-Id: 11705725 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A6E23618 for ; Fri, 7 Aug 2020 13:24:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 91AF722C9F for ; Fri, 7 Aug 2020 13:24:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="rbSx3MU2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726175AbgHGNXy (ORCPT ); Fri, 7 Aug 2020 09:23:54 -0400 Received: from mx07-00178001.pphosted.com ([185.132.182.106]:1948 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726030AbgHGNXq (ORCPT ); Fri, 7 Aug 2020 09:23:46 -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 077DNYS6017470; Fri, 7 Aug 2020 15:23:34 +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=NonnIc54xDpZGLpaLwm33yot64+Hhf3leoq0DVIpPl8=; b=rbSx3MU2+i6dLMYuqT9jNwavR3Rpr0eq/DflWtvG/BokTfAp7fuVEOnPojzFzYuJkhQe d3y3HWg/V2M5PFx0d+6tXG9G+ZqaU+yBKAfsNcKejUuOwloFqBOALHFwFxYw6m21pC7j oHZ3yiqEHQs+G4u2Qf5PfZx441okcUc4XGV5fiWMTNmIR5htYUm5gNoADq+7iJVP3nH7 QJPh4cZBXairA8YnRpANz5LrZ0DO7QXZZkxC2SWTRukoIjncazQ8QZE6ICX3Mtk20xLE w2zLcY18IPxnHc3MXEjPxskray1OofKdITWNiEf6qqiiLRPPuHleFF2nzuuw2oYt+LNa yQ== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 32n6thsxsa-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 07 Aug 2020 15:23:34 +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 14E18100034; Fri, 7 Aug 2020 15:23:30 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag3node2.st.com [10.75.127.8]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 06B7B2B8A02; Fri, 7 Aug 2020 15:23:30 +0200 (CEST) Received: from localhost (10.75.127.49) by SFHDAG3NODE2.st.com (10.75.127.8) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Fri, 7 Aug 2020 15:23:29 +0200 From: Alain Volmat To: , CC: , , , , , , , Subject: [PATCH 1/5] spi: stm32h7: fix race condition at end of transfer Date: Fri, 7 Aug 2020 15:21:21 +0200 Message-ID: <1596806485-3810-2-git-send-email-alain.volmat@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1596806485-3810-1-git-send-email-alain.volmat@st.com> References: <1596806485-3810-1-git-send-email-alain.volmat@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.49] X-ClientProxiedBy: SFHDAG2NODE3.st.com (10.75.127.6) 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=2020-08-07_09:2020-08-06,2020-08-07 signatures=0 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@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 --- 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;