--- zzzz-none-000/linux-3.10.107/drivers/scsi/megaraid/mega_common.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/scsi/megaraid/mega_common.h	2021-02-04 17:41:59.000000000 +0000
@@ -204,7 +204,7 @@
 #define SCP2HOSTDATA(scp)		SCP2HOST(scp)->hostdata	// to soft state
 #define SCP2CHANNEL(scp)		(scp)->device->channel	// to channel
 #define SCP2TARGET(scp)			(scp)->device->id	// to target
-#define SCP2LUN(scp)			(scp)->device->lun	// to LUN
+#define SCP2LUN(scp)			(u32)(scp)->device->lun	// to LUN
 
 // generic macro to convert scsi command and host to controller's soft state
 #define SCSIHOST2ADAP(host)	(((caddr_t *)(host->hostdata))[0])