--- /opt/kernel/linux-2.2.18-pre14/drivers/scsi/ide-scsi.c	Fri Sep  1 02:21:36 2000
+++ drivers/scsi/ide-scsi.c	Sun Oct  1 18:47:43 2000
@@ -96,6 +96,7 @@
 	unsigned long flags;			/* Status/Action flags */
 	unsigned long transform;		/* SCSI cmd translation layer */
 	unsigned long log;			/* log flags */
+	int last_lun;				/* last LUN */
 } idescsi_scsi_t;
 
 /*
@@ -508,8 +509,11 @@
 	drive->ready_stat = 0;
 	memset (scsi, 0, sizeof (idescsi_scsi_t));
 	scsi->drive = drive;
-	if (drive->id && (drive->id->config & 0x0060) == 0x20)
-		set_bit (IDESCSI_DRQ_INTERRUPT, &scsi->flags);
+	if (drive->id) {
+		if ((drive->id->config & 0x0060) == 0x20)
+			set_bit (IDESCSI_DRQ_INTERRUPT, &scsi->flags);
+		scsi->last_lun = drive->id->last_lun;
+	}
 	set_bit(IDESCSI_TRANSFORM, &scsi->transform);
 	clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
 #if IDESCSI_DEBUG_LOG
@@ -603,11 +607,15 @@
 int idescsi_detect (Scsi_Host_Template *host_template)
 {
 	struct Scsi_Host *host;
+	int last_lun = 0;
 	int id;
 
 	host_template->proc_dir = &idescsi_proc_dir;
 	host = scsi_register(host_template, 0);
-	for (id = 0; id < MAX_HWIFS * MAX_DRIVES && idescsi_drives[id]; id++);
+	for (id = 0; id < MAX_HWIFS * MAX_DRIVES && idescsi_drives[id]; id++)
+		last_lun = IDE_MAX(last_lun, idescsi_drives[id]->id->last_lun);
+
+	host->max_lun = last_lun + 1;
 	host->max_id = id;
 	host->can_queue = host->cmd_per_lun * id;
 	return 1;
@@ -736,20 +744,24 @@
 
 	if (!drive) {
 		printk (KERN_ERR "ide-scsi: drive id %d not present\n", cmd->target);
-		goto abort;
+		goto error;
 	}
 	scsi = drive->driver_data;
 	pc = kmalloc (sizeof (idescsi_pc_t), GFP_ATOMIC);
 	rq = kmalloc (sizeof (struct request), GFP_ATOMIC);
 	if (rq == NULL || pc == NULL) {
 		printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name);
-		goto abort;
+		goto error;
 	}
 
 	memset (pc->c, 0, 12);
 	pc->flags = 0;
 	pc->rq = rq;
 	memcpy (pc->c, cmd->cmnd, cmd->cmd_len);
+	if ((pc->c[1] >> 5) > scsi->last_lun) {
+		cmd->result = DID_ABORT << 16;
+		goto abort;
+	}
 	if (cmd->use_sg) {
 		pc->buffer = NULL;
 		pc->sg = cmd->request_buffer;
@@ -784,10 +796,12 @@
 	(void) ide_do_drive_cmd (drive, rq, ide_end);
 	spin_lock_irq(&io_request_lock);
 	return 0;
+
+error:
+	cmd->result = DID_ERROR << 16;
 abort:
 	if (pc) kfree (pc);
 	if (rq) kfree (rq);
-	cmd->result = DID_ERROR << 16;
 	done(cmd);
 	return 0;
 }
--- /opt/kernel/linux-2.2.18-pre14/include/linux/hdreg.h	Thu May  4 02:16:51 2000
+++ include/linux/hdreg.h	Sun Oct  1 18:51:07 2000
@@ -246,7 +246,7 @@
 	unsigned short	word123;	/* reserved (word 123) */
 	unsigned short	word124;	/* reserved (word 124) */
 	unsigned short	word125;	/* reserved (word 125) */
-	unsigned short	word126;	/* reserved (word 126) */
+	unsigned short	last_lun;	/* last lun on device */
 	unsigned short	word127;	/* reserved (word 127) */
 	unsigned short	security;	/* bits 0:support 1:enabled 2:locked 3:frozen */
 	unsigned short	reserved[127];