summaryrefslogtreecommitdiffstats
path: root/scripts/coccinelle/free/iounmap.cocci
blob: 5384f4ba11922b975cb23958aaf399891125d05d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
/// Find missing iounmaps.
///
//# This only signals a missing iounmap when there is an iounmap later
//# in the same function.
//# False positives can be due to loops.
//
// Confidence: Moderate
// Copyright: (C) 2012 Julia Lawall, INRIA/LIP6.  GPLv2.
// Copyright: (C) 2012 Gilles Muller, INRIA/LiP6.  GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options:

virtual context
virtual org
virtual report

@iom@
expression e;
statement S,S1;
int ret;
position p1,p2,p3;
@@

e = \(ioremap@p1\|ioremap_nocache@p1\)(...)
... when != iounmap(e)
if (<+...e...+>) S
... when any
    when != iounmap(e)
    when != if (...) { ... iounmap(e); ... }
(
 if (ret == 0) S1
|
if (...)
   { ...
     return 0; }
|
if (...)
   { ...
     return <+...e...+>; }
|
*if@p2 (...)
   { ... when != iounmap(e)
         when forall
     return@p3 ...; }
)
... when any
iounmap(e);

@script:python depends on org@
p1 << iom.p1;
p2 << iom.p2;
p3 << iom.p3;
@@

cocci.print_main("ioremap",p1)
cocci.print_secs("if",p2)
cocci.print_secs("needed iounmap",p3)

@script:python depends on report@
p1 << iom.p1;
p2 << iom.p2;
p3 << iom.p3;
@@

msg = "ERROR: missing iounmap; ioremap on line %s and execution via conditional on line %s" % (p1[0].line,p2[0].line)
coccilib.report.print_report(p3[0],msg)