From patchwork Tue Aug 10 08:17:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 12428241 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=-16.8 required=3.0 tests=BAYES_00, 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 24781C4338F for ; Tue, 10 Aug 2021 08:17:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0917F60FD8 for ; Tue, 10 Aug 2021 08:17:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238036AbhHJIR4 (ORCPT ); Tue, 10 Aug 2021 04:17:56 -0400 Received: from muru.com ([72.249.23.125]:40666 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237000AbhHJIRz (ORCPT ); Tue, 10 Aug 2021 04:17:55 -0400 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id A529280CF; Tue, 10 Aug 2021 08:17:52 +0000 (UTC) From: Tony Lindgren To: Mark Brown Cc: linux-spi@vger.kernel.org, Sanchayan Maity , Vladimir Oltean , Peter Ujfalusi , Vinod Koul Subject: [PATCH 1/2] spi: spi-fsl-dspi: Fix issue with uninitialized dma_slave_config Date: Tue, 10 Aug 2021 11:17:26 +0300 Message-Id: <20210810081727.19491-1-tony@atomide.com> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Depending on the DMA driver being used, the struct dma_slave_config may need to be initialized to zero for the unused data. For example, we have three DMA drivers using src_port_window_size and dst_port_window_size. If these are left uninitialized, it can cause DMA failures. For spi-fsl-dspi, this is probably not currently an issue but is still good to fix though. Fixes: 90ba37033cb9 ("spi: spi-fsl-dspi: Add DMA support for Vybrid") Cc: Sanchayan Maity Cc: Vladimir Oltean Cc: Peter Ujfalusi Cc: Vinod Koul Signed-off-by: Tony Lindgren Acked-by: Vladimir Oltean --- drivers/spi/spi-fsl-dspi.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -530,6 +530,7 @@ static int dspi_request_dma(struct fsl_dspi *dspi, phys_addr_t phy_addr) goto err_rx_dma_buf; } + memset(&cfg, 0, sizeof(cfg)); cfg.src_addr = phy_addr + SPI_POPR; cfg.dst_addr = phy_addr + SPI_PUSHR; cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;