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=-0.9 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS 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 C1921C43387 for ; Sun, 16 Dec 2018 02:22:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 697222084D for ; Sun, 16 Dec 2018 02:22:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=landley-net.20150623.gappssmtp.com header.i=@landley-net.20150623.gappssmtp.com header.b="T9tsWGnJ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729069AbeLPCWp (ORCPT ); Sat, 15 Dec 2018 21:22:45 -0500 Received: from mail-it1-f196.google.com ([209.85.166.196]:56074 "EHLO mail-it1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728203AbeLPCWp (ORCPT ); Sat, 15 Dec 2018 21:22:45 -0500 Received: by mail-it1-f196.google.com with SMTP id o19so14356281itg.5 for ; Sat, 15 Dec 2018 18:22:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=landley-net.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=QLEzE1gs14L451hGTts5hkde1NU2Nqbf9O9ZmCLqUmg=; b=T9tsWGnJ794c6M36K55byWDJdgGRIpirOqrAJyfy6AAh3ZM4120u5Mraj8uXsKfXHK KxUY/DC0e1Rd1rdLeyGTqimxb8dnLFYvTNVrBvF3AYS0So9xAxNDPj261EHEuqAW/r/4 4mCl4wVRFPK+YFFHAhMGtU+1YVQhDp9kZqRlSe0wZbdskee6o1aBiwLjskEvp89DdGYc 1nbKxpL2znV6CQdo0G+tv3Smiuld0B7utQGYQNqIr2yj+dz8z/CgvGrlIczEA/NWNdu3 dEZAQO6/wJqKF0j14or9koTCsdXBoouRk3eb6sjNQE0RkNYl2lnDDGSxRnPyg06lLwMX neWg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=QLEzE1gs14L451hGTts5hkde1NU2Nqbf9O9ZmCLqUmg=; b=g7UqE09AWty9RPE8aizOMZf3RjLMVY5UIK+Gb0JN0oA1IxVh9zwzK/Nu/1CNv11cgu fIY6DcxvXw8ticH0/eevoUBisUSwlLDl/HZRxgupbgJSadIY5PYEZZd81Ahc0QnKMGfn xHaEk1oLww1H7wNZliG8xfuDylABUfYDUsP/XqOArFfSk/LkhFmmzaSMunOC5v+EYNsl 4FBH+E9yVut9KdlH5k2jGsX4pVz5UAx+VpHfFeSAA/EUI4zfmuTXF7ycH8tPB4AK262S UIIHQuKPxzxagS8XVRLTBBYbH8bTO91RJAuUFHdpO0Etog8XcSerQekYihYxo3/mtpBZ 6frw== X-Gm-Message-State: AA+aEWYwmPz9ereEfKjDA7oeZS43anK2+WosVNqUerXqm1uCKTUKVvhJ LnCZ8z8jZJABJoDbw8/0U/vnRjq97ec= X-Google-Smtp-Source: AFSGD/XLYKuoVMzdVO1Oyf28mlb/tBL0zJN8dK2etataJcvrd/zic5ApZYA/tPleQl++bKtIALd1Jw== X-Received: by 2002:a02:7127:: with SMTP id n39mr7798070jac.91.1544926964462; Sat, 15 Dec 2018 18:22:44 -0800 (PST) Received: from [192.168.43.100] ([172.58.139.65]) by smtp.googlemail.com with ESMTPSA id g12sm3749656iok.38.2018.12.15.18.22.43 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 15 Dec 2018 18:22:43 -0800 (PST) Subject: Re: [PATCH v4 0/4] serial: sh-sci: Fix fallback to PIO on DMA failure To: Geert Uytterhoeven , Greg Kroah-Hartman , Jiri Slaby Cc: Ulrich Hecht , Wolfram Sang , Yoshihiro Shimoda , Yoshinori Sato , linux-renesas-soc@vger.kernel.org, linux-sh@vger.kernel.org, linux-serial@vger.kernel.org References: <20181213184444.21904-1-geert+renesas@glider.be> From: Rob Landley Message-ID: Date: Sat, 15 Dec 2018 20:22:42 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: <20181213184444.21904-1-geert+renesas@glider.be> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org On 12/13/18 12:44 PM, Geert Uytterhoeven wrote: > Hi Greg, Jiri, > > When submitting a DMA request fails, the sh-sci driver is supposed to > fall back to PIO. However, this never really worked due to various > reasons (sh-sci driver issues and dmaengine framework limitations). Is it possible to test this under qemu-system-sh4? (Does that emulate the DMA controller?) Rob