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=-6.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no 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 4B43CC48BE0 for ; Thu, 10 Jun 2021 23:53:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 323B96136D for ; Thu, 10 Jun 2021 23:53:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230351AbhFJXzU (ORCPT ); Thu, 10 Jun 2021 19:55:20 -0400 Received: from mail.kernel.org ([198.145.29.99]:34090 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229578AbhFJXzS (ORCPT ); Thu, 10 Jun 2021 19:55:18 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2E95A6108E; Thu, 10 Jun 2021 23:53:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1623369201; bh=1zH71ovmh14caYSetueMphwRQtBcsUIGDJVzbxjkDA4=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=bAnrWtUKfsYY8bKRX96hNC9KgOJvw7yBFz6jbgyb24/i7w7jHXes/SQXiJVDjUEH0 2RckCXVG/7wONhAz+u7LVAVPqVnzVkPBvX2fk9OuYtcvaIce0S2lY0PK29MuCZbSyd TC0s4/dSIeMITkYCHqIOZs3YIfyirJS3Cz5ODPp0CilGh+THHRcoeq9u6KSr0qQbtH i/ojbILdmQqanIpA4fRng82hMZrgr0Ig6Oa5NddDQAdqaqPx3I+RDOmwuJxm3lKIyp 5t8JK20diJoRlaiRxk187oZIyjx72wg1Os07x8peK5QRyiwhKD72z9LSKvlezcUCSu Z8wV30FzjXplw== Date: Thu, 10 Jun 2021 18:53:19 -0500 From: Bjorn Helgaas To: Shanker R Donthineni Cc: Amey Narkhede , Bjorn Helgaas , alex.williamson@redhat.com, Raphael Norwitz , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, kw@linux.com, Sinan Kaya , Len Brown , "Rafael J . Wysocki" Subject: Re: [PATCH v7 7/8] PCI: Enable NO_BUS_RESET quirk for Nvidia GPUs Message-ID: <20210610235319.GA2796526@bjorn-Precision-5520> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <762dd911-2899-f4e7-da38-860316febbf0@nvidia.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 10, 2021 at 06:43:26PM -0500, Shanker R Donthineni wrote: > On 6/10/21 6:16 PM, Bjorn Helgaas wrote: > >> From: Shanker Donthineni > >> > >> On select platforms, some Nvidia GPU devices do not work with SBR. > > Interesting that you say "on select platforms." Apparently SBR does > > work for some of these GPUs, but not on all platforms? If you have > > any clarification here, I can still update the commit log. > > > Yes, SBR works for some GPUs but GPUs which are listed in this quirk will > not work and these GPUs are available only on selected server platforms. > I believe commit text reflects the issue but please update if needed.  It sounds like there is no actual dependency on the platform. So even though these GPUs are only available on certain platforms, if one were to move one of them to a different, non-supported platform, SBR would still not work. So I think I'll remove the reference to "select platforms" since it doesn't add any useful information and might suggest that SBR should work on some platforms, if you could only find the right ones. Bjorn