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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, 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 2E5ECC433FF for ; Fri, 9 Aug 2019 06:48:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F0D522166E for ; Fri, 9 Aug 2019 06:48:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2405603AbfHIGsy (ORCPT ); Fri, 9 Aug 2019 02:48:54 -0400 Received: from mx1.redhat.com ([209.132.183.28]:44864 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405239AbfHIGsy (ORCPT ); Fri, 9 Aug 2019 02:48:54 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 5E8F72CD811; Fri, 9 Aug 2019 06:48:54 +0000 (UTC) Received: from dhcp201-121.englab.pnq.redhat.com (unknown [10.65.16.3]) by smtp.corp.redhat.com (Postfix) with ESMTP id 46ADF1001925; Fri, 9 Aug 2019 06:48:49 +0000 (UTC) From: Pankaj Gupta To: amit@kernel.org, mst@redhat.com Cc: arnd@arndb.de, gregkh@linuxfoundation.org, virtualization@lists.linux-foundation.org, jasowang@redhat.com, linux-kernel@vger.kernel.org, pagupta@redhat.com, xiaohli@redhat.com Subject: [PATCH v3 0/2] virtio_console: fix replug of virtio console port Date: Fri, 9 Aug 2019 12:18:45 +0530 Message-Id: <20190809064847.28918-1-pagupta@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Fri, 09 Aug 2019 06:48:54 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch series fixes the issue with unplug/replug of a port in virtio console driver which fails with an error "Error allocating inbufs\n". Patch 1 makes use of 'virtqueue_detach_unused_buf' function to detach the unused buffers during port hotunplug time. Patch 2 updates the next avail index for packed ring code. Tested the packed ring code with the qemu virtio 1.1 device code posted here [1]. Changes from v2 Better change log in patch2 - [Greg] Changes from v1[2] Make virtio packed ring code compatible with split ring - [Michael] [1] https://marc.info/?l=qemu-devel&m=156471883703948&w=2 [2] https://lkml.org/lkml/2019/3/4/517 Pankaj Gupta (2): virtio_console: free unused buffers with port delete virtio: decrement avail idx with buffer detach for packed ring char/virtio_console.c | 14 +++++++++++--- virtio/virtio_ring.c | 6 ++++++ 2 files changed, 17 insertions(+), 3 deletions(-) -- 2.21.0