From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: UDMA with CS5530 using IBM Netvista N2200 (8363) Date: Mon, 15 Sep 2008 01:49:53 -0700 Message-ID: <48CE21B1.6070808@gmail.com> References: <48C45BEF.5090502@gmail.com> <20080908094332.7b021b4e@lxorguk.ukuu.org.uk> <48C5BD49.6090204@gmail.com> <20080909115248.580eba78@lxorguk.ukuu.org.uk> <48C70313.6080704@gmail.com> <20080910093840.0fc9df68@the-village.bc.nu> <43e9b8530809100614t616154caldb32c4207b5b44ad@mail.gmail.com> <48C7DFEC.1090109@ru.mvista.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from ti-out-0910.google.com ([209.85.142.185]:5029 "EHLO ti-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751241AbYIOIvS (ORCPT ); Mon, 15 Sep 2008 04:51:18 -0400 Received: by ti-out-0910.google.com with SMTP id b6so1097648tic.23 for ; Mon, 15 Sep 2008 01:51:17 -0700 (PDT) In-Reply-To: <48C7DFEC.1090109@ru.mvista.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Sergei Shtylyov Cc: Antonio Martins , linux-ide@vger.kernel.org Sergei Shtylyov wrote: > There's "libata.dma=" option (if you can pass it), set it to 0 > and DMA won't ever be used. > Note that the "old" IDE code also has the parameter controlling > DMA usage (even per drive) -- look for "nodma" in > Documentation/ide/ide.txt. libata.force can do per device or per-port speed override. libata.force=1.00:pio4 -- tejun