[PATCH] Register scsi devices after naming them

scsi_add_lun doesn't set sdp->devfs_name before calling
scsi_register_device().  Since scsi_register_device calls down to things
like sd_probe, which do try to use sdp->devfs_name, things fail.

Just an easy change, moving the sdp->devfs_name creation before calling
scsi_register_device().

drivers/scsi/scsi_scan.c

@@ -619,12 +619,12 @@ static int scsi_add_lun(Scsi_Device *sdev, char *inq_result, int *bflags)
 	if (inq_result[7] & 0x10)
 		sdev->sdtr = 1;
 
-	scsi_device_register(sdev);
-
 	sprintf(sdev->devfs_name, "scsi/host%d/bus%d/target%d/lun%d",
 				sdev->host->host_no, sdev->channel,
 				sdev->id, sdev->lun);
 
+	scsi_device_register(sdev);
+
 	/*
 	 * End driverfs/devfs code.
 	 */