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-rw-r--r--drivers/block/xen-blkfront.c11
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)