xen/blkfront: Make sure that the device is fully ready before allowing release.

Wim Colgate · Jens Axboe · commit 04c063505825 · 2008-07-03T13:21:13.000+02:00
[ linux-2.6.18-xen changeset c1c57fea77e9 ]

Signed-off-by: Wim Colgate &lt;wim@xensource.com&gt;
Signed-off-by: Jeremy Fitzhardinge &lt;jeremy.fitzhardinge@citrix.com&gt;
Signed-off-by: Jens Axboe &lt;jens.axboe@oracle.com&gt;
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
@@ -997,7 +997,7 @@ static int blkif_release(struct inode *inode, struct file *filep)
 		struct xenbus_device *dev = info->xbdev;
 		enum xenbus_state state = xenbus_read_driver_state(dev->otherend);
 
-		if (state == XenbusStateClosing)
+		if (state == XenbusStateClosing && info->is_ready)
 			blkfront_closing(dev);
 	}
 	return 0;

Original file line number	Diff line number	Diff line change
`@@ -997,7 +997,7 @@ static int blkif_release(struct inode inode, struct file filep)`
`997`	`997`	`struct xenbus_device *dev = info->xbdev;`
`998`	`998`	`enum xenbus_state state = xenbus_read_driver_state(dev->otherend);`
`999`	`999`
`1000`		`- if (state == XenbusStateClosing)`
	`1000`	`+ if (state == XenbusStateClosing && info->is_ready)`
`1001`	`1001`	`blkfront_closing(dev);`
`1002`	`1002`	`}`
`1003`	`1003`	`return 0;`