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vhost: make vhost_dev_cleanup() idempotent

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It is called on multiple code path, so make it safe to call several
times (note: I don't remember a reproducer here, but a function called
'cleanup' should probably be idempotent in my book)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Marc-André Lureau 2016-07-27 01:15:02 +04:00 committed by Michael S. Tsirkin
parent 5be5f9be72
commit e0547b59dc
1 changed files with 6 additions and 1 deletions
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7
hw/virtio/vhost.c
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@ -1123,6 +1123,7 @@ fail:
void vhost_dev_cleanup(struct vhost_dev *hdev) void vhost_dev_cleanup(struct vhost_dev *hdev)
{ {
int i; int i;
for (i = 0; i < hdev->nvqs; ++i) { for (i = 0; i < hdev->nvqs; ++i) {
vhost_virtqueue_cleanup(hdev->vqs + i); vhost_virtqueue_cleanup(hdev->vqs + i);
} }
@ -1137,8 +1138,12 @@ void vhost_dev_cleanup(struct vhost_dev *hdev)
} }
g_free(hdev->mem); g_free(hdev->mem);
g_free(hdev->mem_sections); g_free(hdev->mem_sections);
hdev->vhost_ops->vhost_backend_cleanup(hdev); if (hdev->vhost_ops) {
hdev->vhost_ops->vhost_backend_cleanup(hdev);
}
assert(!hdev->log); assert(!hdev->log);
memset(hdev, 0, sizeof(struct vhost_dev));
} }
/* Stop processing guest IO notifications in qemu. /* Stop processing guest IO notifications in qemu.