From patchwork Wed Jul 7 08:27:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alain Volmat X-Patchwork-Id: 471107 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=-18.8 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, 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 2C088C07E9E for ; Wed, 7 Jul 2021 08:27:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 182F961CB0 for ; Wed, 7 Jul 2021 08:27:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230517AbhGGIag (ORCPT ); Wed, 7 Jul 2021 04:30:36 -0400 Received: from mx07-00178001.pphosted.com ([185.132.182.106]:5432 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230480AbhGGIaf (ORCPT ); Wed, 7 Jul 2021 04:30:35 -0400 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 1678RZkK008701; Wed, 7 Jul 2021 10:27:42 +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=uTl+uyZFsI1SfNjyqEV2zl99tFDW1bfBw2aH9jeYOAY=; b=CrbjUwmigarD63M3/1EGypbn7tQjPrvPaV/KGxUL1E5etBrjIAZsHk/t4J7uaSSrPcld pEjnhx39LjCL9YYgz8bsywDhZKt5NR/ef+4g7UREgGp4im1TWYubNJbAJ1Q8uJSmEJ6n LkSdeDdcsYGeKXLoZmAV95v9EbuSZZ1q8dij8exbqnjhTDLqXgxUhfp7BEEJNVbSH9rW VMPaz5nRgoTxSaFw22lISBKicThd/voHju8/ElIc2QU7xv1IoaJSISEbFeDbpTqaBqOk iuBqdtYnQUNSIxCGV9Khh5hWjr79+KNWoYdKDdeBjhWKNCD1Nhxc2L87NGs2MSMtjWRZ kg== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 39muqtu2xt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 07 Jul 2021 10:27:42 +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 71D85100034; Wed, 7 Jul 2021 10:27:42 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 65E6F215125; Wed, 7 Jul 2021 10:27:42 +0200 (CEST) Received: from localhost (10.75.127.49) by SFHDAG2NODE3.st.com (10.75.127.6) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 7 Jul 2021 10:27:41 +0200 From: Alain Volmat To: , CC: , , , , , , , Subject: [PATCH v2 4/7] spi: stm32: Revert "properly handle 0 byte transfer" Date: Wed, 7 Jul 2021 10:27:03 +0200 Message-ID: <1625646426-5826-5-git-send-email-alain.volmat@foss.st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1625646426-5826-1-git-send-email-alain.volmat@foss.st.com> References: <1625646426-5826-1-git-send-email-alain.volmat@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.49] X-ClientProxiedBy: SFHDAG2NODE1.st.com (10.75.127.4) To SFHDAG2NODE3.st.com (10.75.127.6) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.790 definitions=2021-07-07_05:2021-07-06,2021-07-07 signatures=0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org 0 byte transfer handling is now done within the core in code added by commit b306320322c9 ("spi: Skip zero-length transfers in spi_transfer_one_message()") This reverts commit 2269f5a8b1a7 ("spi: stm32: properly handle 0 byte transfer") Signed-off-by: Alain Volmat --- drivers/spi/spi-stm32.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index 4dbd5cbe0c11..d37bfead4d8c 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -1647,10 +1647,6 @@ static int stm32_spi_transfer_one(struct spi_master *master, struct stm32_spi *spi = spi_master_get_devdata(master); int ret; - /* Don't do anything on 0 bytes transfers */ - if (transfer->len == 0) - return 0; - spi->tx_buf = transfer->tx_buf; spi->rx_buf = transfer->rx_buf; spi->tx_len = spi->tx_buf ? transfer->len : 0;