2 files changed, 53 insertions, 90 deletions
diff --git a/scripts/coccinelle/api/devm_ioremap_resource.cocci b/scripts/coccinelle/api/devm_ioremap_resource.cocci
deleted file mode 100644
index 495daa3dbf77..000000000000
--- a/scripts/coccinelle/api/devm_ioremap_resource.cocci
+++ /dev/null
@@ -1,90 +0,0 @@
-virtual patch
-virtual report
-
-@depends on patch@
-expression base, dev, res;
-@@
-
--base = devm_request_and_ioremap(dev, res);
-+base = devm_ioremap_resource(dev, res);
- ...
- if (
--base == NULL
-+IS_ERR(base)
- || ...) {
-<...
--	return ...;
-+	return PTR_ERR(base);
-...>
- }
-
-@depends on patch@
-expression e, E, ret;
-identifier l;
-@@
-
- e = devm_ioremap_resource(...);
- ...
- if (IS_ERR(e) || ...) {
- 	... when any
--	ret = E;
-+	ret = PTR_ERR(e);
- 	...
-(
- 	return ret;
-|
- 	goto l;
-)
- }
-
-@depends on patch@
-expression e;
-@@
-
- e = devm_ioremap_resource(...);
- ...
- if (IS_ERR(e) || ...) {
- 	...
--	\(dev_dbg\|dev_err\|pr_debug\|pr_err\|DRM_ERROR\)(...);
- 	...
- }
-
-@depends on patch@
-expression e;
-identifier l;
-@@
-
- e = devm_ioremap_resource(...);
- ...
- if (IS_ERR(e) || ...)
--{
-(
- 	return ...;
-|
- 	goto l;
-)
--}
-
-@r depends on report@
-expression e;
-identifier l;
-position p1;
-@@
-
-*e = devm_request_and_ioremap@p1(...);
- ...
- if (e == NULL || ...) {
- 	...
-(
- 	return ...;
-|
- 	goto l;
-)
- }
-
-@script:python depends on r@
-p1 << r.p1;
-@@
-
-msg = "ERROR: deprecated devm_request_and_ioremap() API used on line %s" % (p1[0].line)
-coccilib.report.print_report(p1[0], msg)
diff --git a/scripts/coccinelle/free/ifnullfree.cocci b/scripts/coccinelle/free/ifnullfree.cocci
new file mode 100644
index 000000000000..a42d70bf88b3
--- /dev/null
+++ b/scripts/coccinelle/free/ifnullfree.cocci
@@ -0,0 +1,53 @@
+/// NULL check before some freeing functions is not needed.
+///
+/// Based on checkpatch warning
+/// "kfree(NULL) is safe this check is probably not required"
+/// and kfreeaddr.cocci by Julia Lawall.
+///
+// Copyright: (C) 2014 Fabian Frederick.  GPLv2.
+// Comments: -
+// Options: --no-includes --include-headers
+
+virtual patch
+virtual org
+virtual report
+virtual context
+
+@r2 depends on patch@
+expression E;
+@@
+- if (E)
+(
+-	kfree(E);
++ kfree(E);
+|
+-	debugfs_remove(E);
++ debugfs_remove(E);
+|
+-	debugfs_remove_recursive(E);
++ debugfs_remove_recursive(E);
+|
+-	usb_free_urb(E);
++ usb_free_urb(E);
+)
+
+@r depends on context || report || org @
+expression E;
+position p;
+@@
+
+* if (E)
+*	\(kfree@p\|debugfs_remove@p\|debugfs_remove_recursive@p\|usb_free_urb\)(E);
+
+@script:python depends on org@
+p << r.p;
+@@
+
+cocci.print_main("NULL check before that freeing function is not needed", p)
+
+@script:python depends on report@
+p << r.p;
+@@
+
+msg = "WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values."
+coccilib.report.print_report(p[0], msg)