NFS: Fix atime revalidation in read()

NFSv3 will correctly update atime on a read() call, so there is no need to
set the NFS_INO_INVALID_ATIME flag unless the call to nfs_refresh_inode()
fails.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/nfs3proc.c

@@ -727,9 +727,9 @@ static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
 {
 	if (nfs3_async_handle_jukebox(task, data->inode))
 		return -EAGAIN;
-	/* Call back common NFS readpage processing */
-	if (task->tk_status >= 0)
-		nfs_refresh_inode(data->inode, &data->fattr);
+
+	nfs_invalidate_atime(data->inode);
+	nfs_refresh_inode(data->inode, &data->fattr);
 	return 0;
 }
 

fs/nfs/nfs4proc.c

@@ -2396,6 +2396,8 @@ static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
 		rpc_restart_call(task);
 		return -EAGAIN;
 	}
+
+	nfs_invalidate_atime(data->inode);
 	if (task->tk_status > 0)
 		renew_lease(server, data->timestamp);
 	return 0;

fs/nfs/proc.c

@@ -552,6 +552,7 @@ nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 
 static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
 {
+	nfs_invalidate_atime(data->inode);
 	if (task->tk_status >= 0) {
 		nfs_refresh_inode(data->inode, data->res.fattr);
 		/* Emulate the eof flag, which isn't normally needed in NFSv2

fs/nfs/read.c

@@ -341,9 +341,6 @@ int nfs_readpage_result(struct rpc_task *task, struct nfs_read_data *data)
 		set_bit(NFS_INO_STALE, &NFS_FLAGS(data->inode));
 		nfs_mark_for_revalidate(data->inode);
 	}
-	spin_lock(&data->inode->i_lock);
-	NFS_I(data->inode)->cache_validity |= NFS_INO_INVALID_ATIME;
-	spin_unlock(&data->inode->i_lock);
 	return 0;
 }