Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753299AbaJFPIK (ORCPT ); Mon, 6 Oct 2014 11:08:10 -0400 Received: from mx1.redhat.com ([209.132.183.28]:26387 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752903AbaJFPIG (ORCPT ); Mon, 6 Oct 2014 11:08:06 -0400 Date: Mon, 6 Oct 2014 18:11:25 +0300 From: "Michael S. Tsirkin" To: linux-kernel@vger.kernel.org Cc: kvm@vger.kernel.org, Rusty Russell , virtualization@lists.linux-foundation.org, Arnd Bergmann , Greg Kroah-Hartman , Amit Shah Subject: [PATCH v2 13/15] virtio_console: enable VQs early Message-ID: <1412608214-31944-14-git-send-email-mst@redhat.com> References: <1412608214-31944-1-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1412608214-31944-1-git-send-email-mst@redhat.com> X-Mutt-Fcc: =sent Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org virtio spec requires drivers to set DRIVER_OK before using VQs. This is set automatically after probe returns, virtio console violated this rule by adding inbufs, which causes the VQ to be used directly within probe. To fix, call virtio_enable_vqs_early before using VQs. Signed-off-by: Michael S. Tsirkin --- drivers/char/virtio_console.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index b585b47..6ebe8f6 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -1449,6 +1449,8 @@ static int add_port(struct ports_device *portdev, u32 id) spin_lock_init(&port->outvq_lock); init_waitqueue_head(&port->waitqueue); + virtio_enable_vqs_early(portdev->vdev); + /* Fill the in_vq with buffers so the host can send us data. */ nr_added_bufs = fill_queue(port->in_vq, &port->inbuf_lock); if (!nr_added_bufs) { -- MST -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/