1 files changed, 93 insertions, 0 deletions
diff --git a/debian/patches/10_cdromlock.patch b/debian/patches/10_cdromlock.patch
new file mode 100644
index 0000000..436f97c
--- /dev/null
+++ b/debian/patches/10_cdromlock.patch
@@ -0,0 +1,93 @@
+Index: b/linux/dev/glue/block.c
+===================================================================
+--- a/linux/dev/glue/block.c
++++ b/linux/dev/glue/block.c
+@@ -789,6 +789,7 @@ static struct block_data *open_list;
+ extern struct device_emulation_ops linux_block_emulation_ops;
+ 
+ static io_return_t device_close (void *);
++static io_return_t device_close_forced (void *, int);
+ 
+ /* Return a send right for block device BD.  */
+ static ipc_port_t
+@@ -1164,6 +1165,7 @@ out:
+ 	    {
+ 	      ipc_kobject_set (bd->port, IKO_NULL, IKOT_NONE);
+ 	      ipc_port_dealloc_kernel (bd->port);
++            *devp = IP_NULL;
+ 	    }
+ 	  kfree ((vm_offset_t) bd, sizeof (struct block_data));
+ 	  bd = NULL;
+@@ -1174,18 +1176,16 @@ out:
+       bd->open_count = 1;
+       bd->next = open_list;
+       open_list = bd;
++      *devp = &bd -> device;
+     }
+ 
+-  if (IP_VALID (reply_port))
+-    ds_device_open_reply (reply_port, reply_port_type, err, dev_to_port (bd));
+-  else if (! err)
++  if (!IP_VALID (reply_port) && ! err)
+     device_close (bd);
+-
+-  return MIG_NO_REPLY;
++  return err;
+ }
+ 
+ static io_return_t
+-device_close (void *d)
++device_close_forced (void *d, int force)
+ {
+   struct block_data *bd = d, *bdp, **prev;
+   struct device_struct *ds = bd->ds;
+@@ -1202,7 +1202,7 @@ device_close (void *d)
+     }
+   ds->busy = 1;
+ 
+-  if (--bd->open_count == 0)
++  if (force || --bd->open_count == 0)
+     {
+       /* Wait for pending I/O to complete.  */
+       while (bd->iocount > 0)
+@@ -1245,6 +1245,13 @@ device_close (void *d)
+   return D_SUCCESS;
+ }
+ 
++static io_return_t
++device_close (void *d)
++{
++  return device_close_forced (d, 0);
++}
++
++
+ #define MAX_COPY	(VM_MAP_COPY_PAGE_LIST_MAX << PAGE_SHIFT)
+ 
+ /* Check block BN and size COUNT for I/O validity
+@@ -1704,6 +1711,17 @@ device_get_status (void *d, dev_flavor_t
+   return D_INVALID_OPERATION;
+ }
+ 
++
++static void
++device_no_senders (mach_no_senders_notification_t *ns)
++{
++  device_t dev;
++
++  dev = dev_port_lookup((ipc_port_t) ns->not_header.msgh_remote_port);
++  assert(dev);
++  device_close_forced (dev->emul_data, 1);
++}
++
+ struct device_emulation_ops linux_block_emulation_ops =
+ {
+   NULL,
+@@ -1719,7 +1737,7 @@ struct device_emulation_ops linux_block_
+   device_get_status,
+   NULL,
+   NULL,
+-  NULL,
++  device_no_senders,
+   NULL,
+   NULL
+ };