xen/xenbus: client: Fix call of virt_to_mfn in xenbus_grant_ring

[firefly-linux-kernel-4.4.55.git] / drivers / xen / xenbus / xenbus_client.c

diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c
index a014016eb7b0f87e6bebf95a2e0f3927d8d5101e..9ad327238ba931243967455b5790916dc6b184f1 100644 (file)
--- a/drivers/xen/xenbus/xenbus_client.c
+++ b/drivers/xen/xenbus/xenbus_client.c
@@ -379,16 +379,16 @@ int xenbus_grant_ring(struct xenbus_device *dev, void *vaddr,
        int i, j;
 
        for (i = 0; i < nr_pages; i++) {
-               unsigned long addr = (unsigned long)vaddr +
-                       (PAGE_SIZE * i);
                err = gnttab_grant_foreign_access(dev->otherend_id,
-                                                 virt_to_mfn(addr), 0);
+                                                 virt_to_mfn(vaddr), 0);
                if (err < 0) {
                        xenbus_dev_fatal(dev, err,
                                         "granting access to ring page");
                        goto fail;
                }
                grefs[i] = err;
+
+               vaddr = vaddr + PAGE_SIZE;
        }
 
        return 0;