From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anthony Liguori Subject: Re: [Qemu-devel] [PATCH v3 01/39] virtio-pci: get config on init Date: Mon, 08 Aug 2011 07:45:19 -0500 Message-ID: <4E3FDA5F.5050105@codemonkey.ws> References: <1312463195-13605-1-git-send-email-avi@redhat.com> <1312463195-13605-2-git-send-email-avi@redhat.com> <4E3BF599.4050207@codemonkey.ws> <20110808103606.GA10372@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Avi Kivity , kvm@vger.kernel.org, qemu-devel@nongnu.org To: "Michael S. Tsirkin" Return-path: Received: from mail-pz0-f42.google.com ([209.85.210.42]:56465 "EHLO mail-pz0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752479Ab1HHMpX (ORCPT ); Mon, 8 Aug 2011 08:45:23 -0400 Received: by pzk37 with SMTP id 37so8261751pzk.1 for ; Mon, 08 Aug 2011 05:45:23 -0700 (PDT) In-Reply-To: <20110808103606.GA10372@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On 08/08/2011 05:36 AM, Michael S. Tsirkin wrote: >> Thinking more closely, I don't think this right. >> >> Updating on map ensured that the config was refreshed after each >> time the bar was mapped. In the very least, the config needs to be >> refreshed during reset because the guest may write to the guest >> space which should get cleared after reset. >> >> Regards, >> >> Anthony Liguori > > Not sure I understand. Which register, for example, > do you have in mind? > Could you clarify please? Actually, you never need to call config_get() AFAICT. It's called in every read/write access. So I think the code you changed is extraneous now. Regards, Anthony Liguori > >>> } >>> >>> static int virtio_blk_init_pci(PCIDevice *pci_dev) >