scsi: use set/get_unaligned_be32 in report_luns

Signed-off-by: NRob Evers <revers@redhat.com>
Reviewed-by: NEwan D. Milne <emilne@redhat.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

drivers/scsi/scsi_scan.c

@@ -34,6 +34,7 @@
 #include <linux/spinlock.h>
 #include <linux/async.h>
 #include <linux/slab.h>
+#include <asm/unaligned.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_cmnd.h>
@@ -1367,7 +1368,6 @@ static int scsi_report_lun_scan(struct scsi_target *starget, int bflags,
 	unsigned int retries;
 	int result;
 	struct scsi_lun *lunp, *lun_data;
-	u8 *data;
 	struct scsi_sense_hdr sshdr;
 	struct scsi_device *sdev;
 	struct Scsi_Host *shost = dev_to_shost(&starget->dev);
@@ -1433,10 +1433,7 @@ static int scsi_report_lun_scan(struct scsi_target *starget, int bflags,
 	/*
 	 * bytes 6 - 9: length of the command.
 	 */
-	scsi_cmd[6] = (unsigned char) (length >> 24) & 0xff;
-	scsi_cmd[7] = (unsigned char) (length >> 16) & 0xff;
-	scsi_cmd[8] = (unsigned char) (length >> 8) & 0xff;
-	scsi_cmd[9] = (unsigned char) length & 0xff;
+	put_unaligned_be32(length, &scsi_cmd[6]);
 
 	scsi_cmd[10] = 0;	/* reserved */
 	scsi_cmd[11] = 0;	/* control */
@@ -1484,9 +1481,7 @@ static int scsi_report_lun_scan(struct scsi_target *starget, int bflags,
 	/*
 	 * Get the length from the first four bytes of lun_data.
 	 */
-	data = (u8 *) lun_data->scsi_lun;
-	length = ((data[0] << 24) | (data[1] << 16) |
-		  (data[2] << 8) | (data[3] << 0));
+	length = get_unaligned_be32(lun_data->scsi_lun);
 
 	num_luns = (length / sizeof(struct scsi_lun));
 	if (num_luns > max_scsi_report_luns) {