1// SPDX-License-Identifier: GPL-2.0
2/// Find missing put_device for every of_find_device_by_node.
3///
4// Confidence: Moderate
5// Copyright: (C) 2018-2019 Wen Yang, ZTE.
6// Comments:
7// Options: --no-includes --include-headers
8
9virtual report
10virtual org
11
12@search exists@
13local idexpression id;
14expression x,e,e1;
15position p1,p2;
16type T,T1,T2,T3;
17@@
18
19id = of_find_device_by_node@p1(x)
20... when != e = id
21if (id == NULL || ...) { ... return ...; }
22... when != put_device(&id->dev)
23    when != platform_device_put(id)
24    when != if (id) { ... put_device(&id->dev) ... }
25    when != e1 = (T)id
26    when != e1 = (T)(&id->dev)
27    when != e1 = get_device(&id->dev)
28    when != e1 = (T1)platform_get_drvdata(id)
29(
30  return
31(    id
32|    (T2)dev_get_drvdata(&id->dev)
33|    (T3)platform_get_drvdata(id)
34|    &id->dev
35);
36| return@p2 ...;
37)
38
39@script:python depends on report@
40p1 << search.p1;
41p2 << search.p2;
42@@
43
44coccilib.report.print_report(p2[0],
45                             "ERROR: missing put_device; call of_find_device_by_node on line "
46                             + p1[0].line
47                             + ", but without a corresponding object release within this function.")
48
49@script:python depends on org@
50p1 << search.p1;
51p2 << search.p2;
52@@
53
54cocci.print_main("of_find_device_by_node", p1)
55cocci.print_secs("needed put_device", p2)
56