[PATCH] cciss: busy_initializing flag

This patch adds a flag called busy_initializing.  If there are multiple
controllers in a server AND the HP agents are running it's possible the agents
may try to poll a card that is still initializing if the driver is removed and
then added again.

Signed-off-by: Don Brace <dab@hp.com>
Signed-off-by: Mike Miller <mike.miller@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 9 insertions, 0 deletions

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 4a49d7972126..8bcd6c498c60 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 @@ clean2:
 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 566587d0a500..11ee83504b38 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.