scsi: lpfc: Use kcalloc()

Use kcalloc() instead of kmalloc() + memset().

Link: https://lore.kernel.org/r/20220313141847.109804-1-Julia.Lawall@inria.frSuggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/lpfc_debugfs.c

@@ -6272,9 +6272,9 @@ lpfc_debugfs_initialize(struct lpfc_vport *vport)
 				 phba->hba_debugfs_root,
 				 phba, &lpfc_debugfs_op_slow_ring_trc);
 		if (!phba->slow_ring_trc) {
-			phba->slow_ring_trc = kmalloc(
-				(sizeof(struct lpfc_debugfs_trc) *
-				lpfc_debugfs_max_slow_ring_trc),
+			phba->slow_ring_trc = kcalloc(
+				lpfc_debugfs_max_slow_ring_trc,
+				sizeof(struct lpfc_debugfs_trc),
 				GFP_KERNEL);
 			if (!phba->slow_ring_trc) {
 				lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
@@ -6283,9 +6283,6 @@ lpfc_debugfs_initialize(struct lpfc_vport *vport)
 				goto debug_failed;
 			}
 			atomic_set(&phba->slow_ring_trc_cnt, 0);
-			memset(phba->slow_ring_trc, 0,
-				(sizeof(struct lpfc_debugfs_trc) *
-				lpfc_debugfs_max_slow_ring_trc));
 		}
 
 		snprintf(name, sizeof(name), "nvmeio_trc");