NFS: Fix a bad cast in nfs3_read_done

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index df80477..e4a1cd4 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -735,7 +735,7 @@
 static void
 nfs3_read_done(struct rpc_task *task)
 {
-	struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
+	struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata;
 
 	if (nfs3_async_handle_jukebox(task))
 		return;