staging: lustre: fix 'error handling' issues for libcfs workitem.c

Fix 'error handling' issues found by Coverity version 6.5.1:
Unchecked return value (CHECKED_RETURN)
Calling function without checking return value.
Signed-off-by: Sebastien Buisson <sebastien.buisson@bull.net>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3427
Reviewed-on: http://review.whamcloud.com/7103Reviewed-by: Bobbie Lind <bobbie.j.lind@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/libcfs/workitem.c

@@ -225,7 +225,9 @@ cfs_wi_scheduler (void *arg)
 
 	/* CPT affinity scheduler? */
 	if (sched->ws_cptab != NULL)
-		cfs_cpt_bind(sched->ws_cptab, sched->ws_cpt);
+		if (cfs_cpt_bind(sched->ws_cptab, sched->ws_cpt) != 0)
+			CWARN("Failed to bind %s on CPT %d\n",
+			      sched->ws_name, sched->ws_cpt);
 
 	spin_lock(&cfs_wi_data.wi_glock);