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virtio: make del_vqs idempotent 

Our code calls del_vqs multiple times, assuming
it's idempotent.

commit 3ec7a77bb3
    virtio_pci: free up vq->priv
broke this assumption, by adding kfree there,
so multiple calls cause double free.

Fix it up.

Fixes: 3ec7a77bb3
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2015-01-04 17:21:58 +02:00
parent b1940cd21c
commit 80e9541f79
1 changed files with 1 additions and 0 deletions
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1
drivers/virtio/virtio_pci_common.c
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@ -282,6 +282,7 @@ void vp_del_vqs(struct virtio_device *vdev)
vp_free_vectors(vdev); vp_free_vectors(vdev);
kfree(vp_dev->vqs); kfree(vp_dev->vqs);
vp_dev->vqs = NULL;
} }
static int vp_try_to_find_vqs(struct virtio_device *vdev, unsigned nvqs, static int vp_try_to_find_vqs(struct virtio_device *vdev, unsigned nvqs,