From patchwork Fri Feb 5 18:59:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alain Volmat X-Patchwork-Id: 12070769 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=-17.1 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,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 5543EC433E0 for ; Fri, 5 Feb 2021 19:01:43 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 E666264EE8 for ; Fri, 5 Feb 2021 19:01:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E666264EE8 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=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-ID:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=diJbZMb8SNKlLhoVF0Ttg2EsBlBJmoKeoMMgF32ov7Y=; b=hMKO5TDJ2Hapa3Qrp2gjBAwxO RfWVYMz2MbJXb1+u8ykBM4pI80gXeR9VYKHq1NteXgk0t1j99KvLWoV12JU1XErU/Tt3bC3XlYjMN pr+jBOBwsN34JRUYJTEEAblG0eoVBp2yLtkOWje0mNdoVuATzy3pKzShZLBPaElDKlDfYOSya8a27 KXqnrgT6RFWiFyIEbIbOF2SeaiqBXFW0pQitaeKJwPUV4G70Qb+dMm+zI8COZG+bRQaBbGb/4yM4T eNLHprXyRZ9jRQjGn7NOWmMp0IZc7AtqPD2uGvezDmraOg8qS0qjH690EhLfqLoL2PxjMir1aPU7Z BxabNeq1Q==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l86L3-00088r-7E; Fri, 05 Feb 2021 19:00:17 +0000 Received: from mx07-00178001.pphosted.com ([185.132.182.106]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l86Kf-0007zj-0X for linux-arm-kernel@lists.infradead.org; Fri, 05 Feb 2021 18:59:56 +0000 Received: from pps.filterd (m0241204.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 115IomVF012790; Fri, 5 Feb 2021 19:59:47 +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=6dFY2ygti+JHJq5SYwtjGwM1/NcaHN0m25S8t2BBTLk=; b=ZJHgDxVaR83Zeogr0GwWymX7kBdRPfi2TlOzSpW2rcMbWiGJ2uYHLC+jwewbGKRbp132 X39sHEF/UV46FSgewx8gGd58ubkdf+Rz1bMXsiJdhJMoA/o69rZ02dQCvJS9PfNZdE1C s4vyAaXw1/NlHDBqlmRy62q06VKfhGU7uYkQ/e/BrE5Nq3HQFctcuRW8lGI20RLZUW+F k9PYalBeGJFa76zMN5ykGRDb7tgc3e04sNwVb0rk8us7l4mOdhBjWrr3PDMyyU5hHzRv 2qiyTbcMovLh3w1yZ0ZzhUNO9n+sUGA6FnEtKWKYAq7uLNr23f8kpLys6DlpJq8YEYTc fg== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 36ey7hj46w-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 05 Feb 2021 19:59:47 +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 E1CD910002A; Fri, 5 Feb 2021 19:59:46 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id D5D272C38D3; Fri, 5 Feb 2021 19:59:46 +0100 (CET) Received: from localhost (10.75.127.46) by SFHDAG2NODE3.st.com (10.75.127.6) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Fri, 5 Feb 2021 19:59:46 +0100 From: Alain Volmat To: , Subject: [PATCH v2 4/8] spi: stm32h7: ensure message are smaller than max size Date: Fri, 5 Feb 2021 19:59:28 +0100 Message-ID: <1612551572-495-5-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: [10.75.127.46] X-ClientProxiedBy: SFHDAG1NODE3.st.com (10.75.127.3) 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210205_135953_435508_8CDE9E01 X-CRM114-Status: GOOD ( 16.26 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kernel@vger.kernel.org, alexandre.torgue@foss.st.com, fabrice.gasnier@foss.st.com, mcoquelin.stm32@gmail.com, alain.volmat@foss.st.com, linux-spi@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Ensure that messages given to transfer_one handler can actually be handled by it. For that purpose rely on the SPI framework spi_split_transfers_maxsize function to split messages whenever necessary. Signed-off-by: Alain Volmat --- v2: reordered within the serie drivers/spi/spi-stm32.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index a46132e81533..8e4db219b95d 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -1004,6 +1004,20 @@ static int stm32_spi_prepare_msg(struct spi_master *master, !!(spi_dev->mode & SPI_LSB_FIRST), !!(spi_dev->mode & SPI_CS_HIGH)); + /* On STM32H7, messages should not exceed a maximum size setted + * afterward via the set_number_of_data function. In order to + * ensure that, split large messages into several messages + */ + if (spi->cfg->set_number_of_data) { + int ret; + + ret = spi_split_transfers_maxsize(master, msg, + STM32H7_SPI_TSIZE_MAX, + GFP_KERNEL | GFP_DMA); + if (ret) + return ret; + } + spin_lock_irqsave(&spi->lock, flags); /* CPOL, CPHA and LSB FIRST bits have common register */