diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 4a49d7972126ee37588131a09cae02a362ad1256..8bcd6c498c609c2905105eee1e2fd5ed50b133bc 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -468,6 +468,9 @@ static int cciss_open(struct inode *inode, struct file *filep)
 	printk(KERN_DEBUG "cciss_open %s\n", inode->i_bdev->bd_disk->disk_name);
 #endif /* CCISS_DEBUG */ 
 
+	if (host->busy_initializing)
+		return -EBUSY;
+
 	/*
 	 * Root is allowed to open raw volume zero even if it's not configured
 	 * so array config can still work. Root is also allowed to open any
@@ -2742,6 +2745,9 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	i = alloc_cciss_hba();
 	if(i < 0)
 		return (-1);
+
+	hba[i]->busy_initializing = 1;
+
 	if (cciss_pci_init(hba[i], pdev) != 0)
 		goto clean1;
 
@@ -2864,6 +2870,7 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 		add_disk(disk);
 	}
 
+	hba[i]->busy_initializing = 0;
 	return(1);
 
 clean4:
@@ -2884,6 +2891,7 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 clean1:
 	release_io_mem(hba[i]);
 	free_hba(i);
+	hba[i]->busy_initializing = 0;
 	return(-1);
 }
 
diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index 566587d0a5003726dc75e5fe7ea67ad639581c54..11ee83504b3828f322117185e9b0649c8051718d 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -83,6 +83,7 @@ struct ctlr_info
 	int			nr_allocs;
 	int			nr_frees; 
 	int			busy_configuring;
+	int			busy_initializing;
 
 	/* This element holds the zero based queue number of the last
 	 * queue to be started.  It is used for fairness.