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,URIBL_BLOCKED,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 DA614C43215 for ; Sat, 16 Nov 2019 15:54:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A4AEC218AE for ; Sat, 16 Nov 2019 15:54:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573919654; bh=+MSac9lGQ3g4tukeHIJJKFOOP18cM1X5Kz249xwJKOY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=sOa8g3NVbo5FMzv+O/ST8FgLNjyKn1LB2Lv6GJCYJkmU9OyUEOPM1n/EmEQTgDZln OBvraqdOMgyxV/zKHw5n9uU/aFyD65DqWZLAdKh6958CQxvoY5Zn4cwMlHcPa6QYXJ yshZzS4KCS5vt9f3eEMYPc/61nciW0QPpNcP7xcA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728349AbfKPPyM (ORCPT ); Sat, 16 Nov 2019 10:54:12 -0500 Received: from mail.kernel.org ([198.145.29.99]:35428 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731373AbfKPPyC (ORCPT ); Sat, 16 Nov 2019 10:54:02 -0500 Received: from sasha-vm.mshome.net (unknown [50.234.116.4]) (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 6C72220B7C; Sat, 16 Nov 2019 15:54:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573919641; bh=+MSac9lGQ3g4tukeHIJJKFOOP18cM1X5Kz249xwJKOY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ud9eQNW5TP1X106S7MpeAC+VwsFMVR7DIO4oZxtsmt8Urc92Cn/KX9I9rbgwsnkZn yBgtOUZAxrhAXzJ79qPJ50yFeKupja2jfFRlmtIZQI2Ek8+7slKe/Rm20k9KRrW7IC PZPmivlilhBFxvzcgl9QdeDCHQdTdSwUYgbQ9IJM= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Christoph Hellwig , "Martin K . Petersen" , Sasha Levin , dc395x@twibble.org, linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 21/77] scsi: dc395x: fix DMA API usage in sg_update_list Date: Sat, 16 Nov 2019 10:52:43 -0500 Message-Id: <20191116155339.11909-21-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191116155339.11909-1-sashal@kernel.org> References: <20191116155339.11909-1-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: Christoph Hellwig [ Upstream commit 6c404a68bf83b4135a8a9aa1c388ebdf98e8ba7f ] We need to transfer device ownership to the CPU before we can manipulate the mapped data. Signed-off-by: Christoph Hellwig Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/dc395x.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/scsi/dc395x.c b/drivers/scsi/dc395x.c index 9da0ac360848f..830b2d2dcf206 100644 --- a/drivers/scsi/dc395x.c +++ b/drivers/scsi/dc395x.c @@ -1972,6 +1972,11 @@ static void sg_update_list(struct ScsiReqBlk *srb, u32 left) xferred -= psge->length; } else { /* Partial SG entry done */ + pci_dma_sync_single_for_cpu(srb->dcb-> + acb->dev, + srb->sg_bus_addr, + SEGMENTX_LEN, + PCI_DMA_TODEVICE); psge->length -= xferred; psge->address += xferred; srb->sg_index = idx; -- 2.20.1