1 files changed, 82 insertions, 0 deletions
diff --git a/trunk/2.6.21/20960_linux-2.6-xen-blkfront-wait-add.patch b/trunk/2.6.21/20960_linux-2.6-xen-blkfront-wait-add.patch
new file mode 100644
index 0000000..d372df7
--- /dev/null
+++ b/trunk/2.6.21/20960_linux-2.6-xen-blkfront-wait-add.patch
@@ -0,0 +1,82 @@
+Index: patching/drivers/xen/blkfront/blkfront.c
+===================================================================
+--- patching.orig/drivers/xen/blkfront/blkfront.c
++++ patching/drivers/xen/blkfront/blkfront.c
+@@ -354,6 +354,8 @@ static void connect(struct blkfront_info
+ 	spin_unlock_irq(&blkif_io_lock);
+ 
+ 	add_disk(info->gd);
++
++	info->is_ready = 1;
+ }
+ 
+ /**
+@@ -863,6 +865,13 @@ static void blkif_recover(struct blkfron
+ 	spin_unlock_irq(&blkif_io_lock);
+ }
+ 
++int blkfront_is_ready(struct xenbus_device *dev)
++{
++	struct blkfront_info *info = dev->dev.driver_data;
++
++	return info->is_ready;
++}
++
+ 
+ /* ** Driver Registration ** */
+ 
+@@ -881,6 +890,7 @@ static struct xenbus_driver blkfront = {
+ 	.remove = blkfront_remove,
+ 	.resume = blkfront_resume,
+ 	.otherend_changed = backend_changed,
++	.is_ready = blkfront_is_ready,
+ };
+ 
+ 
+Index: patching/drivers/xen/blkfront/block.h
+===================================================================
+--- patching.orig/drivers/xen/blkfront/block.h
++++ patching/drivers/xen/blkfront/block.h
+@@ -111,6 +111,7 @@ struct blkfront_info
+ 	struct blk_shadow shadow[BLK_RING_SIZE];
+ 	unsigned long shadow_free;
+ 	int feature_barrier;
++	int is_ready;
+ 
+ 	/**
+ 	 * The number of people holding this device open.  We won't allow a
+Index: patching/drivers/xen/xenbus/xenbus_probe.c
+===================================================================
+--- patching.orig/drivers/xen/xenbus/xenbus_probe.c
++++ patching/drivers/xen/xenbus/xenbus_probe.c
+@@ -995,6 +995,7 @@ static int is_disconnected_device(struct
+ {
+ 	struct xenbus_device *xendev = to_xenbus_device(dev);
+ 	struct device_driver *drv = data;
++	struct xenbus_driver *xendrv;
+ 
+ 	/*
+ 	 * A device with no driver will never connect. We care only about
+@@ -1007,7 +1008,9 @@ static int is_disconnected_device(struct
+ 	if (drv && (dev->driver != drv))
+ 		return 0;
+ 
+-	return (xendev->state != XenbusStateConnected);
++	xendrv = to_xenbus_driver(dev->driver);
++	return (xendev->state != XenbusStateConnected ||
++		(xendrv->is_ready && !xendrv->is_ready(xendev)));
+ }
+ 
+ static int exists_disconnected_device(struct device_driver *drv)
+Index: patching/include/xen/xenbus.h
+===================================================================
+--- patching.orig/include/xen/xenbus.h
++++ patching/include/xen/xenbus.h
+@@ -106,6 +106,7 @@ struct xenbus_driver {
+ 	int (*uevent)(struct xenbus_device *, char **, int, char *, int);
+ 	struct device_driver driver;
+ 	int (*read_otherend_details)(struct xenbus_device *dev);
++	int (*is_ready)(struct xenbus_device *dev);
+ };
+ 
+ static inline struct xenbus_driver *to_xenbus_driver(struct device_driver *drv)