--- linux-2.4.2-0.1.19.sectlimit/drivers/scsi/hosts.c.~1~	Fri Mar  2 16:46:28 2001
+++ linux-2.4.2-0.1.19.sectlimit/drivers/scsi/hosts.c	Fri Mar  2 16:46:51 2001
@@ -233,6 +233,8 @@
 
     retval->select_queue_depths = tpnt->select_queue_depths;
 
+    retval->max_sectors = tpnt->max_sectors;
+
     if(!scsi_hostlist)
 	scsi_hostlist = retval;
     else {
--- linux-2.4.2-0.1.19.sectlimit/drivers/scsi/hosts.h.~1~	Fri Mar  2 16:46:08 2001
+++ linux-2.4.2-0.1.19.sectlimit/drivers/scsi/hosts.h	Fri Mar  2 16:46:17 2001
@@ -242,6 +242,11 @@
     short unsigned int sg_tablesize;
 
     /*
+     * if the host adapter has limitations beside segment count
+     */
+    short unsigned int max_sectors;
+
+    /*
      * True if this host adapter can make good use of linked commands.
      * This will allow more than one command to be queued to a given
      * unit on a given host.  Set this to the maximum number of command
@@ -379,6 +384,7 @@
     int can_queue;
     short cmd_per_lun;
     short unsigned int sg_tablesize;
+    short unsigned int max_sectors;
 
     unsigned in_recovery:1;
     unsigned unchecked_isa_dma:1;
--- linux-2.4.2-0.1.19.sectlimit/drivers/scsi/scsi.c.~1~	Fri Mar  2 16:46:08 2001
+++ linux-2.4.2-0.1.19.sectlimit/drivers/scsi/scsi.c	Fri Mar  2 16:46:17 2001
@@ -1827,6 +1827,11 @@
 		return 1;	/* Must be already loaded, or
 				 * no detect routine available
 				 */
+
+	/* If max_sectors isn't set, default to max */
+	if (!tpnt->max_sectors)
+		tpnt->max_sectors = MAX_SECTORS;
+
 	pcount = next_scsi_host;
 
 	/* The detect routine must carefully spinunlock/spinlock if 
--- linux-2.4.2-0.1.19.sectlimit/drivers/scsi/scsi_merge.c.~1~	Fri Mar  2 16:46:08 2001
+++ linux-2.4.2-0.1.19.sectlimit/drivers/scsi/scsi_merge.c	Fri Mar  2 16:46:17 2001
@@ -417,6 +417,9 @@
 		max_segments = 64;
 #endif
 
+	if ((req->nr_sectors + (bh->b_size >> 9)) > SHpnt->max_sectors)
+		return 0;
+
 	if (use_clustering) {
 		/* 
 		 * See if we can do this without creating another
@@ -473,6 +476,9 @@
 		max_segments = 64;
 #endif
 
+	if ((req->nr_sectors + (bh->b_size >> 9)) > SHpnt->max_sectors)
+		return 0;
+
 	if (use_clustering) {
 		/* 
 		 * See if we can do this without creating another
@@ -624,6 +630,10 @@
 		return 0;
 	}
 #endif
+
+	if ((req->nr_sectors + next->nr_sectors) > SHpnt->max_sectors)
+		return 0;
+
 	/*
 	 * The main question is whether the two segments at the boundaries
 	 * would be considered one or two.