From patchwork Fri Feb 5 18:59:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alain Volmat X-Patchwork-Id: 377367 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=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 64DF7C433E0 for ; Fri, 5 Feb 2021 19:07:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 27B9F64E05 for ; Fri, 5 Feb 2021 19:07:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233328AbhBERYe (ORCPT ); Fri, 5 Feb 2021 12:24:34 -0500 Received: from mx07-00178001.pphosted.com ([185.132.182.106]:47617 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233728AbhBERSa (ORCPT ); Fri, 5 Feb 2021 12:18:30 -0500 Received: from pps.filterd (m0046668.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 115IpxT5022513; Fri, 5 Feb 2021 19:59:49 +0100 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=rpRVpeMqY05scC8ONlNNaolclDZcKJC+t70jj36hAoE=; b=f1V0IYOOI24Pt7bgd2jRMqxC0ko9o/lBf26YJQsx8R8BYVRS1S9vZ1XNZx/q0DqCNtX3 sRB0S5EgNWpQ3rfP+2KHcYESr74+M9aPG6E7Q++NXzL14w4G7jcZCnaPWnvM3q1LCYgb LtTUjWv3zJpvD5KIX25D1okxQEfbpDEdJZZqWGbm42kOMD3kkJJKnYMZm16XUlhCtdJR 0+RbSufwwQZoaEc4/Ea3jq9ZaAQi/xNf4QkMCp81tzD/Q0EoHVqoHo8izzDIbslP1Fmn vPX9eGiviPQ8nNyorhmro/T/QCJVigkGPJ+Z2/gTDWGV61IObAIgivbSyTsiGVCvQad/ 0w== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 36d0fsgjqt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 05 Feb 2021 19:59:48 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 9160510002A; Fri, 5 Feb 2021 19:59:48 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 863282C38D3; Fri, 5 Feb 2021 19:59:48 +0100 (CET) Received: from localhost (10.75.127.47) by SFHDAG2NODE3.st.com (10.75.127.6) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Fri, 5 Feb 2021 19:59:48 +0100 From: Alain Volmat To: , CC: , , , , , , , Subject: [PATCH v2 8/8] spi: stm32: make spurious and overrun interrupts visible Date: Fri, 5 Feb 2021 19:59:32 +0100 Message-ID: <1612551572-495-9-git-send-email-alain.volmat@foss.st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1612551572-495-1-git-send-email-alain.volmat@foss.st.com> References: <1612551572-495-1-git-send-email-alain.volmat@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.47] X-ClientProxiedBy: SFHDAG1NODE1.st.com (10.75.127.1) To SFHDAG2NODE3.st.com (10.75.127.6) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.737 definitions=2021-02-05_10:2021-02-05,2021-02-05 signatures=0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org We do not expect to receive spurious interrupts so rise a warning if it happens. RX overrun is an error condition that signals a corrupted RX stream both in dma and in irq modes. Report the error and abort the transfer in either cases. Signed-off-by: Alain Volmat --- v2: identical to v1 drivers/spi/spi-stm32.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index f3a4ff60ac4b..25c076461011 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -895,8 +895,8 @@ static irqreturn_t stm32h7_spi_irq_thread(int irq, void *dev_id) mask |= STM32H7_SPI_SR_RXP; if (!(sr & mask)) { - dev_dbg(spi->dev, "spurious IT (sr=0x%08x, ier=0x%08x)\n", - sr, ier); + dev_warn(spi->dev, "spurious IT (sr=0x%08x, ier=0x%08x)\n", + sr, ier); spin_unlock_irqrestore(&spi->lock, flags); return IRQ_NONE; } @@ -923,15 +923,8 @@ static irqreturn_t stm32h7_spi_irq_thread(int irq, void *dev_id) } if (sr & STM32H7_SPI_SR_OVR) { - dev_warn(spi->dev, "Overrun: received value discarded\n"); - if (!spi->cur_usedma && (spi->rx_buf && (spi->rx_len > 0))) - stm32h7_spi_read_rxfifo(spi, false); - /* - * If overrun is detected while using DMA, it means that - * something went wrong, so stop the current transfer - */ - if (spi->cur_usedma) - end = true; + dev_err(spi->dev, "Overrun: RX data lost\n"); + end = true; } if (sr & STM32H7_SPI_SR_EOT) {