From patchwork Tue Aug 10 08:16:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 494632 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 DE339C4338F for ; Tue, 10 Aug 2021 08:16:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B5EEB61076 for ; Tue, 10 Aug 2021 08:16:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237525AbhHJIRP (ORCPT ); Tue, 10 Aug 2021 04:17:15 -0400 Received: from muru.com ([72.249.23.125]:40642 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235675AbhHJIRP (ORCPT ); Tue, 10 Aug 2021 04:17:15 -0400 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 12714812F; Tue, 10 Aug 2021 08:17:11 +0000 (UTC) From: Tony Lindgren To: Ulf Hansson Cc: linux-mmc@vger.kernel.org, Shawn Lin , Jaehoon Chung , Peter Ujfalusi , Vinod Koul Subject: [PATCH 2/3] mmc: dw_mmc: Fix issue with uninitialized dma_slave_config Date: Tue, 10 Aug 2021 11:16:43 +0300 Message-Id: <20210810081644.19353-2-tony@atomide.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210810081644.19353-1-tony@atomide.com> References: <20210810081644.19353-1-tony@atomide.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@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 dw_mmc, this is probably not currently an issue but is still good to fix though. Fixes: 3fc7eaef44db ("mmc: dw_mmc: Add external dma interface support") Cc: Shawn Lin Cc: Jaehoon Chung Cc: Peter Ujfalusi Cc: Vinod Koul Signed-off-by: Tony Lindgren --- drivers/mmc/host/dw_mmc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -782,6 +782,7 @@ static int dw_mci_edmac_start_dma(struct dw_mci *host, int ret = 0; /* Set external dma config: burst size, burst width */ + memset(&cfg, 0, sizeof(cfg)); cfg.dst_addr = host->phy_regs + fifo_offset; cfg.src_addr = cfg.dst_addr; cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;