From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753860AbaJMHr7 (ORCPT ); Mon, 13 Oct 2014 03:47:59 -0400 Received: from mx1.redhat.com ([209.132.183.28]:29941 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753770AbaJMHrw (ORCPT ); Mon, 13 Oct 2014 03:47:52 -0400 Date: Mon, 13 Oct 2014 10:51:04 +0300 From: "Michael S. Tsirkin" To: linux-kernel@vger.kernel.org Cc: Rusty Russell , virtualization@lists.linux-foundation.org, linux-scsi@vger.kernel.org, linux-s390@vger.kernel.org, v9fs-developer@lists.sourceforge.net, netdev@vger.kernel.org, kvm@vger.kernel.org, Amit Shah , Cornelia Huck , Christian Borntraeger , "David S. Miller" , Paolo Bonzini , "James E.J. Bottomley" Subject: [PATCH v4 16/25] virtio_scsi: move kick event out from virtscsi_init Message-ID: <1413114332-626-17-git-send-email-mst-v4@redhat.com> References: <1413114332-626-1-git-send-email-mst-v4@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1413114332-626-1-git-send-email-mst-v4@redhat.com> X-Mutt-Fcc: =sent Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We currently kick event within virtscsi_init, before host is fully initialized. This can in theory confuse guest if device consumes the buffers immediately. To fix, move virtscsi_kick_event_all out to scan/restore. Signed-off-by: Michael S. Tsirkin --- drivers/scsi/virtio_scsi.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c index eee1bc0..0642ce3 100644 --- a/drivers/scsi/virtio_scsi.c +++ b/drivers/scsi/virtio_scsi.c @@ -853,7 +853,11 @@ static void virtscsi_init_vq(struct virtio_scsi_vq *virtscsi_vq, static void virtscsi_scan(struct virtio_device *vdev) { - struct Scsi_Host *shost = (struct Scsi_Host *)vdev->priv; + struct Scsi_Host *shost = virtio_scsi_host(vdev); + struct virtio_scsi *vscsi = shost_priv(shost); + + if (virtio_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) + virtscsi_kick_event_all(vscsi); scsi_scan_host(shost); } @@ -916,9 +920,6 @@ static int virtscsi_init(struct virtio_device *vdev, virtscsi_config_set(vdev, cdb_size, VIRTIO_SCSI_CDB_SIZE); virtscsi_config_set(vdev, sense_size, VIRTIO_SCSI_SENSE_SIZE); - if (virtio_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) - virtscsi_kick_event_all(vscsi); - err = 0; out: @@ -1048,8 +1049,13 @@ static int virtscsi_restore(struct virtio_device *vdev) return err; err = register_hotcpu_notifier(&vscsi->nb); - if (err) + if (err) { vdev->config->del_vqs(vdev); + return err; + } + + if (virtio_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) + virtscsi_kick_event_all(vscsi); return err; } -- MST