From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38024) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VW5zu-0006dH-7Z for qemu-devel@nongnu.org; Tue, 15 Oct 2013 10:53:28 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VW5zo-0000gx-3B for qemu-devel@nongnu.org; Tue, 15 Oct 2013 10:53:22 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34000) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VW5zn-0000gg-Qy for qemu-devel@nongnu.org; Tue, 15 Oct 2013 10:53:16 -0400 From: Paolo Bonzini Date: Tue, 15 Oct 2013 16:52:42 +0200 Message-Id: <1381848773-689-2-git-send-email-pbonzini@redhat.com> In-Reply-To: <1381848773-689-1-git-send-email-pbonzini@redhat.com> References: <1381848773-689-1-git-send-email-pbonzini@redhat.com> Subject: [Qemu-devel] [PATCH v2 01/12] virtio-ccw: move virtio_ccw_stop_ioeventfd to virtio_ccw_busdev_unplug List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: cornelia.huck@de.ibm.com, afaerber@suse.de, mst@redhat.com Similar to the PCI bug that prompted these patches, virtio-ccw will segfault after the reworking of hotplug/hot-unplug. Prepare for this by moving virtio_ccw_stop_ioeventfd to before the freeing of the proxy device. A better place for this could be the device_unplugged callback for the virtio-ccw bus. However, we do not yet have a callback that works: this patch avoids the problem while leaving the tree bisectable. Reported-by: Cornelia Huck Suggested-by: Cornelia Huck Signed-off-by: Paolo Bonzini --- hw/s390x/virtio-ccw.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index cd67db5..a6accdf 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -631,7 +631,6 @@ static int virtio_ccw_exit(VirtioCcwDevice *dev) { SubchDev *sch = dev->sch; - virtio_ccw_stop_ioeventfd(dev); if (sch) { css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); g_free(sch); @@ -1228,6 +1227,8 @@ static int virtio_ccw_busdev_unplug(DeviceState *dev) VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; SubchDev *sch = _dev->sch; + virtio_ccw_stop_ioeventfd(_dev); + /* * We should arrive here only for device_del, since we don't support * direct hot(un)plug of channels, but only through virtio. -- 1.8.3.1