scsi: qla2xxx: Add debug dump of LOGO payload and ELS IOCB

The change adds a way to debug LOGO ELS, likewise PLOGI.

Link: https://lore.kernel.org/r/[e-mail]
Acked-by: Himanshu Madhani <[e-mail]>
Acked-by: Quinn Tran <[e-mail]>
Reviewed-by: Hannes Reinecke <[e-mail]>
Tested-by: Hannes Reinecke <[e-mail]>
Reviewed-by: Bart Van Assche <[e-mail]>
Signed-off-by: Roman Bolshakov <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/qla2xxx/qla_iocb.c

···
 
 	memcpy(elsio->u.els_logo.els_logo_pyld, &logo_pyld,
 	    sizeof(struct els_logo_payload));
+	ql_dbg(ql_dbg_disc + ql_dbg_buffer, vha, 0x3075, "LOGO buffer:");
+	ql_dump_buffer(ql_dbg_disc + ql_dbg_buffer, vha, 0x010a,
+		       elsio->u.els_logo.els_logo_pyld,
+		       sizeof(*elsio->u.els_logo.els_logo_pyld));
 
 	rval = qla2x00_start_sp(sp);
 	if (rval != QLA_SUCCESS) {
···
 		els_iocb->rx_byte_count = 0;
 		els_iocb->rx_address = 0;
 		els_iocb->rx_len = 0;
+		ql_dbg(ql_dbg_io + ql_dbg_buffer, vha, 0x3076,
+		       "LOGO ELS IOCB:");
+		ql_dump_buffer(ql_log_info, vha, 0x010b,
+			       els_iocb,
+			       sizeof(*els_iocb));
 	}
 
 	sp->vha->qla_stats.control_requests++;