1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 4497ff84f64a..dfe61afe676a 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -88,6 +88,7 @@ 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
@@ -839,6 +840,8 @@ static void blkfront_connect(struct blkfront_info *info)
         spin_unlock_irq(&blkif_io_lock);
 
         add_disk(info->gd);
+
+        info->is_ready = 1;
 }
 
 /**
@@ -931,6 +934,13 @@ static int blkfront_remove(struct xenbus_device *dev)
         return 0;
 }
 
+static int blkfront_is_ready(struct xenbus_device *dev)
+{
+        struct blkfront_info *info = dev->dev.driver_data;
+
+        return info->is_ready;
+}
+
 static int blkif_open(struct inode *inode, struct file *filep)
 {
         struct blkfront_info *info = inode->i_bdev->bd_disk->private_data;
@@ -977,6 +987,7 @@ static struct xenbus_driver blkfront = {
         .remove = blkfront_remove,
         .resume = blkfront_resume,
         .otherend_changed = backend_changed,
+        .is_ready = blkfront_is_ready,
 };
 
 static int __init xlblk_init(void)