Merge branch 'stable/vmalloc-3.2' of git://git.kernel.org/pub/scm/linux/kernel/git...

[pandora-kernel.git] / drivers / net / xen-netback / netback.c

diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index d550895..0cb594c 100644 (file)
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -1589,88 +1589,42 @@ static int xen_netbk_kthread(void *data)
 
 void xen_netbk_unmap_frontend_rings(struct xenvif *vif)
 {
-       struct gnttab_unmap_grant_ref op;
-
-       if (vif->tx.sring) {
-               gnttab_set_unmap_op(&op, (unsigned long)vif->tx_comms_area->addr,
-                                   GNTMAP_host_map, vif->tx_shmem_handle);
-
-               if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1))
-                       BUG();
-       }
-
-       if (vif->rx.sring) {
-               gnttab_set_unmap_op(&op, (unsigned long)vif->rx_comms_area->addr,
-                                   GNTMAP_host_map, vif->rx_shmem_handle);
-
-               if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1))
-                       BUG();
-       }
-       if (vif->rx_comms_area)
-               free_vm_area(vif->rx_comms_area);
-       if (vif->tx_comms_area)
-               free_vm_area(vif->tx_comms_area);
+       if (vif->tx.sring)
+               xenbus_unmap_ring_vfree(xenvif_to_xenbus_device(vif),
+                                       vif->tx.sring);
+       if (vif->rx.sring)
+               xenbus_unmap_ring_vfree(xenvif_to_xenbus_device(vif),
+                                       vif->rx.sring);
 }
 
 int xen_netbk_map_frontend_rings(struct xenvif *vif,
                                 grant_ref_t tx_ring_ref,
                                 grant_ref_t rx_ring_ref)
 {
-       struct gnttab_map_grant_ref op;
+       void *addr;
        struct xen_netif_tx_sring *txs;
        struct xen_netif_rx_sring *rxs;
 
        int err = -ENOMEM;
 
-       vif->tx_comms_area = alloc_vm_area(PAGE_SIZE);
-       if (vif->tx_comms_area == NULL)
+       err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(vif),
+                                    tx_ring_ref, &addr);
+       if (err)
                goto err;
 
-       vif->rx_comms_area = alloc_vm_area(PAGE_SIZE);
-       if (vif->rx_comms_area == NULL)
-               goto err;
-
-       gnttab_set_map_op(&op, (unsigned long)vif->tx_comms_area->addr,
-                         GNTMAP_host_map, tx_ring_ref, vif->domid);
-
-       if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1))
-               BUG();
-
-       if (op.status) {
-               netdev_warn(vif->dev,
-                           "failed to map tx ring. err=%d status=%d\n",
-                           err, op.status);
-               err = op.status;
-               goto err;
-       }
-
-       vif->tx_shmem_ref    = tx_ring_ref;
-       vif->tx_shmem_handle = op.handle;
-
-       txs = (struct xen_netif_tx_sring *)vif->tx_comms_area->addr;
+       txs = (struct xen_netif_tx_sring *)addr;
        BACK_RING_INIT(&vif->tx, txs, PAGE_SIZE);
 
-       gnttab_set_map_op(&op, (unsigned long)vif->rx_comms_area->addr,
-                         GNTMAP_host_map, rx_ring_ref, vif->domid);
-
-       if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1))
-               BUG();
-
-       if (op.status) {
-               netdev_warn(vif->dev,
-                           "failed to map rx ring. err=%d status=%d\n",
-                           err, op.status);
-               err = op.status;
+       err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(vif),
+                                    rx_ring_ref, &addr);
+       if (err)
                goto err;
-       }
-
-       vif->rx_shmem_ref     = rx_ring_ref;
-       vif->rx_shmem_handle  = op.handle;
-       vif->rx_req_cons_peek = 0;
 
-       rxs = (struct xen_netif_rx_sring *)vif->rx_comms_area->addr;
+       rxs = (struct xen_netif_rx_sring *)addr;
        BACK_RING_INIT(&vif->rx, rxs, PAGE_SIZE);
 
+       vif->rx_req_cons_peek = 0;
+
        return 0;
 
 err: