virtio: add names to virtqueue struct, mapping from devices to queues.

Add a linked list of all virtqueues for a virtio device: this helps for
debugging and is also needed for upcoming interface change.

Also, add a "name" field for clearer debug messages.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/s390/kvm/kvm_virtio.c b/drivers/s390/kvm/kvm_virtio.c
index cbc8566fab70..ba8995fbf041 100644
--- a/drivers/s390/kvm/kvm_virtio.c
+++ b/drivers/s390/kvm/kvm_virtio.c
@@ -173,8 +173,9 @@ static void kvm_notify(struct virtqueue *vq)
  * this device and sets it up.
  */
 static struct virtqueue *kvm_find_vq(struct virtio_device *vdev,
-                                    unsigned index,
-                                    void (*callback)(struct virtqueue *vq))
+                                     unsigned index,
+                                     void (*callback)(struct virtqueue *vq),
+                                     const char *name)
 {
         struct kvm_device *kdev = to_kvmdev(vdev);
         struct kvm_vqconfig *config;
@@ -194,7 +195,7 @@ static struct virtqueue *kvm_find_vq(struct virtio_device *vdev,
 
         vq = vring_new_virtqueue(config->num, KVM_S390_VIRTIO_RING_ALIGN,
                                  vdev, (void *) config->address,
-                                 kvm_notify, callback);
+                                 kvm_notify, callback, name);
         if (!vq) {
                 err = -ENOMEM;
                 goto unmap;