From: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
To: rusty@rustcorp.com.au, mst@redhat.com,
virtualization@lists.linux-foundation.org
Cc: borntraeger@de.ibm.com
Subject: [PATCH RFC 2/7] s390/virtio_ccw: set virtqueue as broken if host notify failed
Date: Tue, 22 Oct 2013 14:45:06 +0200 [thread overview]
Message-ID: <1382445911-55657-3-git-send-email-graalfs@linux.vnet.ibm.com> (raw)
In-Reply-To: <1382445911-55657-1-git-send-email-graalfs@linux.vnet.ibm.com>
Set the current virtqueue as broken if the appropriate host kick failed
(e.g. if the device was hot-unplugged via host means).
This error info can be exploited at various other places where a host
kick is triggered.
Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
---
drivers/s390/kvm/virtio_ccw.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/s390/kvm/virtio_ccw.c b/drivers/s390/kvm/virtio_ccw.c
index 6a410d4..ac0ace6 100644
--- a/drivers/s390/kvm/virtio_ccw.c
+++ b/drivers/s390/kvm/virtio_ccw.c
@@ -384,6 +384,8 @@ static void virtio_ccw_kvm_notify(struct virtqueue *vq)
vcdev = to_vc_device(info->vq->vdev);
ccw_device_get_schid(vcdev->cdev, &schid);
info->cookie = do_kvm_notify(schid, vq->index, info->cookie);
+ if (info->cookie < 0)
+ virtqueue_set_broken(vq);
}
static int virtio_ccw_read_vq_conf(struct virtio_ccw_device *vcdev,
--
1.8.3.1
next prev parent reply other threads:[~2013-10-22 12:45 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-22 12:45 [PATCH RFC 0/7] virtio: avoid various hang situations during hot-unplug Heinz Graalfs
2013-10-22 12:45 ` [PATCH RFC 1/7] virtio_ring: add new functions virtqueue{_set_broken()/_is_broken()} Heinz Graalfs
2013-10-23 0:06 ` Rusty Russell
2013-10-22 12:45 ` Heinz Graalfs [this message]
2013-10-22 12:45 ` [PATCH RFC 3/7] virtio_net: avoid cpu_relax() call loop in case virtqueue is broken Heinz Graalfs
2013-10-22 12:45 ` [PATCH RFC 4/7] virtio_blk: use dummy virtqueue_notify() to detect host kick error Heinz Graalfs
2013-10-23 0:02 ` Rusty Russell
2013-10-22 12:45 ` [PATCH RFC 5/7] virtio_blk: do not free device id if virtqueue is broken Heinz Graalfs
2013-10-22 12:45 ` [PATCH RFC 6/7] virtio_blk: set request queue as dying in case " Heinz Graalfs
2013-10-22 12:45 ` [PATCH RFC 7/7] virtio_blk: trigger IO errors " Heinz Graalfs
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