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 != of_dev_put(id)
25    when != if (id) { ... put_device(&id->dev) ... }
26    when != e1 = (T)id
27    when != e1 = (T)(&id->dev)
28    when != e1 = get_device(&id->dev)
29    when != e1 = (T1)platform_get_drvdata(id)
30(
31  return
32(    id
33|    (T2)dev_get_drvdata(&id->dev)
34|    (T3)platform_get_drvdata(id)
35|    &id->dev
36);
37| return@p2 ...;
38)
39
40@script:python depends on report@
41p1 << search.p1;
42p2 << search.p2;
43@@
44
45coccilib.report.print_report(p2[0],
46                             "ERROR: missing put_device; call of_find_device_by_node on line "
47                             + p1[0].line
48                             + ", but without a corresponding object release within this function.")
49
50@script:python depends on org@
51p1 << search.p1;
52p2 << search.p2;
53@@
54
55cocci.print_main("of_find_device_by_node", p1)
56cocci.print_secs("needed put_device", p2)
57