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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 10090C33CAF for ; Thu, 16 Jan 2020 23:32:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D850A206D9 for ; Thu, 16 Jan 2020 23:32:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579217568; bh=Yr/v8JCKiAzj9Xg/55tcnrpoweVvorUmgwUtXTSr1Tk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=M4dWSBeEosX4QLY3t5CNtbJHHLeKReNmwN8SSPXKLkEts/78ylpfQrQEg49MCa7lS ep1ao7bgCzg2fwAP8p5alIkzsPxHqjgd1BKvYKH4LbvY8uKnx48fP7plfwmMCYiNqZ OceX8b4gbnSlT54ZKfz3Gyrkf62fSDILs8Wd8ke8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2403889AbgAPXcq (ORCPT ); Thu, 16 Jan 2020 18:32:46 -0500 Received: from mail.kernel.org ([198.145.29.99]:42450 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404193AbgAPXcp (ORCPT ); Thu, 16 Jan 2020 18:32:45 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1F3BD2073A; Thu, 16 Jan 2020 23:32:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579217565; bh=Yr/v8JCKiAzj9Xg/55tcnrpoweVvorUmgwUtXTSr1Tk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fPGVbqrs8VmKZC1kN4wDzKr4b89RP9FMDQkaY55Pz54r1h6KmmUDkvi1E+IApWMqs FfO2G13JguDilvkuHr4/fjqwoXvqqeDGVBYQXJLXKzTAOzJYF6HjxtdP6C5EBgYVkS 4Ktlj/TAeLWY3CiwsuoCZ1BeoMMGV5dJNVT+dZus= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Peng Fan Subject: [PATCH 4.14 50/71] tty: serial: imx: use the sg count from dma_map_sg Date: Fri, 17 Jan 2020 00:18:48 +0100 Message-Id: <20200116231716.579154955@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200116231709.377772748@linuxfoundation.org> References: <20200116231709.377772748@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Peng Fan commit 596fd8dffb745afcebc0ec6968e17fe29f02044c upstream. The dmaengine_prep_slave_sg needs to use sg count returned by dma_map_sg, not use sport->dma_tx_nents, because the return value of dma_map_sg is not always same with "nents". Fixes: b4cdc8f61beb ("serial: imx: add DMA support for imx6q") Signed-off-by: Peng Fan Link: https://lore.kernel.org/r/1573108875-26530-1-git-send-email-peng.fan@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -542,7 +542,7 @@ static void imx_dma_tx(struct imx_port * dev_err(dev, "DMA mapping error for TX.\n"); return; } - desc = dmaengine_prep_slave_sg(chan, sgl, sport->dma_tx_nents, + desc = dmaengine_prep_slave_sg(chan, sgl, ret, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT); if (!desc) { dma_unmap_sg(dev, sgl, sport->dma_tx_nents,