migration: Fix coding style (whitespace issues)

* Remove trailing whitespace (fixes 9 errors from checkpatch.pl).
  One comment line was longer than 80 characters, so wrap it
  and fix a typo, too.
* Replace tabs by blanks (fixes 1 error).

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

migration/rdma.c

@@ -702,7 +702,7 @@ static void qemu_rdma_dump_id(const char *who, struct ibv_context *verbs)
                 verbs->device->ibdev_path,
                 port.link_layer,
                 (port.link_layer == IBV_LINK_LAYER_INFINIBAND) ? "Infiniband" :
-                 ((port.link_layer == IBV_LINK_LAYER_ETHERNET) 
+                 ((port.link_layer == IBV_LINK_LAYER_ETHERNET)
                     ? "Ethernet" : "Unknown"));
 }
 
@@ -737,21 +737,21 @@ static void qemu_rdma_dump_gid(const char *who, struct rdma_cm_id *id)
  * and validate what time of hardware it is.
  *
  * Unfortunately, this puts the user in a fix:
- * 
+ *
  *  If the source VM connects with an IPv4 address without knowing that the
  *  destination has bound to '[::]' the migration will unconditionally fail
  *  unless the management software is explicitly listening on the the IPv4
  *  address while using a RoCE-based device.
  *
  *  If the source VM connects with an IPv6 address, then we're OK because we can
  *  throw an error on the source (and similarly on the destination).
- * 
+ *
  *  But in mixed environments, this will be broken for a while until it is fixed
  *  inside linux.
  *
  * We do provide a *tiny* bit of help in this function: We can list all of the
  * devices in the system and check to see if all the devices are RoCE or
- * Infiniband. 
+ * Infiniband.
  *
  * If we detect that we have a *pure* RoCE environment, then we can safely
  * thrown an error even if the management software has specified '[::]' as the
@@ -770,17 +770,17 @@ static int qemu_rdma_broken_ipv6_kernel(Error **errp, struct ibv_context *verbs)
     /* This bug only exists in linux, to our knowledge. */
 #ifdef CONFIG_LINUX
 
-    /* 
+    /*
      * Verbs are only NULL if management has bound to '[::]'.
-     * 
+     *
      * Let's iterate through all the devices and see if there any pure IB
      * devices (non-ethernet).
-     * 
+     *
      * If not, then we can safely proceed with the migration.
      * Otherwise, there are no guarantees until the bug is fixed in linux.
      */
     if (!verbs) {
-	    int num_devices, x;
+        int num_devices, x;
         struct ibv_device ** dev_list = ibv_get_device_list(&num_devices);
         bool roce_found = false;
         bool ib_found = false;
@@ -825,8 +825,8 @@ static int qemu_rdma_broken_ipv6_kernel(Error **errp, struct ibv_context *verbs)
 
     /*
      * If we have a verbs context, that means that some other than '[::]' was
-     * used by the management software for binding. In which case we can actually 
-     * warn the user about a potential broken kernel;
+     * used by the management software for binding. In which case we can
+     * actually warn the user about a potentially broken kernel.
      */
 
     /* IB ports start with 1, not 0 */