From mboxrd@z Thu Jan 1 00:00:00 1970 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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 3FDE8C433E0 for ; Mon, 8 Jun 2020 23:45:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0E6B220659 for ; Mon, 8 Jun 2020 23:45:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591659902; bh=AAfkLpT9edLdmgMXYbLCzCEGj//XvIHuRpSFFzXZ2xg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=gMi4rLloZvWin5oZicFgCXYuyQAhllIlHGsW5D0hz1zn9nQz0yGu5813rroZ9QJ3P mC1qiluAFaygEmLrkB7fuNkXKebH9QZDASsYW3nkGGxaLOaegCN6hHsDcBlg3mK4TZ ACc9sVZNGJDA8tBAP75JL5wld2XBNjq8enX8GoSc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732441AbgFHXpA (ORCPT ); Mon, 8 Jun 2020 19:45:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:54702 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732046AbgFHX0s (ORCPT ); Mon, 8 Jun 2020 19:26:48 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5437620775; Mon, 8 Jun 2020 23:26:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591658808; bh=AAfkLpT9edLdmgMXYbLCzCEGj//XvIHuRpSFFzXZ2xg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RKncHkAkbrbqUaYVuLagAnpuVY/iaTFmLcVdgy60ddklLqS1v2A6CutDfhAfeZzXl rP7vfSNMfIZwdkf9jmab7UI2Ior4G5eEwcoLLVGzjbPa9xOW0O1PJEU6Q60N9OHJNE vpcdEBV/F65j6TNAo8YcaV7IZ15/lN/vnXR3Rq/Q= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Andy Shevchenko , Feng Tang , Mark Brown , Sasha Levin , linux-spi@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 06/50] spi: dw: Zero DMA Tx and Rx configurations on stack Date: Mon, 8 Jun 2020 19:25:56 -0400 Message-Id: <20200608232640.3370262-6-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200608232640.3370262-1-sashal@kernel.org> References: <20200608232640.3370262-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andy Shevchenko [ Upstream commit 3cb97e223d277f84171cc4ccecab31e08b2ee7b5 ] Some DMA controller drivers do not tolerate non-zero values in the DMA configuration structures. Zero them to avoid issues with such DMA controller drivers. Even despite above this is a good practice per se. Fixes: 7063c0d942a1 ("spi/dw_spi: add DMA support") Signed-off-by: Andy Shevchenko Acked-by: Feng Tang Cc: Feng Tang Link: https://lore.kernel.org/r/20200506153025.21441-1-andriy.shevchenko@linux.intel.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-dw-mid.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c index e31971f91475..f77d03b658ab 100644 --- a/drivers/spi/spi-dw-mid.c +++ b/drivers/spi/spi-dw-mid.c @@ -155,6 +155,7 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_tx(struct dw_spi *dws, if (!xfer->tx_buf) return NULL; + memset(&txconf, 0, sizeof(txconf)); txconf.direction = DMA_MEM_TO_DEV; txconf.dst_addr = dws->dma_addr; txconf.dst_maxburst = 16; @@ -201,6 +202,7 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_rx(struct dw_spi *dws, if (!xfer->rx_buf) return NULL; + memset(&rxconf, 0, sizeof(rxconf)); rxconf.direction = DMA_DEV_TO_MEM; rxconf.src_addr = dws->dma_addr; rxconf.src_maxburst = 16; -- 2.25.1