staging: lustre: lnet: Ensure routing is turned on first time

In lnet_rtrpools_enable(), a mistake was made and routing
was not being turned on when the rtrpools are being allocated
for the first time.

This patch fixes that routine so we remember to turn on
routing after allocating the rtrpools.
Signed-off-by: Doug Oucharek <doug.s.oucharek@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-8501
Reviewed-on: http://review.whamcloud.com/21934Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Amir Shehata <amir.shehata@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lnet/lnet/router.c

@@ -1693,7 +1693,7 @@ lnet_rtrpools_adjust(int tiny, int small, int large)
 int
 lnet_rtrpools_enable(void)
 {
-	int rc;
+	int rc = 0;
 
 	if (the_lnet.ln_routing)
 		return 0;
@@ -1706,8 +1706,8 @@ lnet_rtrpools_enable(void)
 		 * if we are just configuring this for the first
 		 * time.
 		 */
-		return lnet_rtrpools_alloc(1);
-
+		rc = lnet_rtrpools_alloc(1);
+	else
 		rc = lnet_rtrpools_adjust_helper(0, 0, 0);
 	if (rc)
 		return rc;
@@ -1718,7 +1718,7 @@ lnet_rtrpools_enable(void)
 	the_lnet.ln_ping_info->pi_features &= ~LNET_PING_FEAT_RTE_DISABLED;
 	lnet_net_unlock(LNET_LOCK_EX);
 
-	return 0;
+	return rc;
 }
 
 void