NFSv4.1: remove pnfs_layout_hdr from pnfs_destroy_all_layouts tmp_list

Prevents an infinite loop as list was never emptied.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index ff681ab..65455f5 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -383,6 +383,7 @@
 				plh_layouts);
 		dprintk("%s freeing layout for inode %lu\n", __func__,
 			lo->plh_inode->i_ino);
+		list_del_init(&lo->plh_layouts);
 		pnfs_destroy_layout(NFS_I(lo->plh_inode));
 	}
 }