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Message-Id: <1400888504-31309-1-git-send-email-sboyd@codeaurora.org>
Date: Fri, 23 May 2014 16:41:44 -0700
From: Stephen Boyd <sboyd@...eaurora.org>
To: Michal Marek <mmarek@...e.cz>
Cc: linux-kernel@...r.kernel.org,
Mitchel Humpherys <mitchelh@...eaurora.org>,
Julia Lawall <Julia.Lawall@...6.fr>,
Gilles Muller <Gilles.Muller@...6.fr>,
Nicolas Palix <nicolas.palix@...g.fr>,
Grant Likely <grant.likely@...aro.org>,
Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org
Subject: [PATCH] coccinelle: Check for missing NULL terminators in of_device_id tables
Failure to terminate an of_device_id table can lead to confusing
failures depending on where the compiler places the array. Add a
check to make sure these tables are terminated. Thanks to Mitchel
Humpherys for coming up with the initial pattern.
Cc: Mitchel Humpherys <mitchelh@...eaurora.org>
Cc: Julia Lawall <Julia.Lawall@...6.fr>
Cc: Gilles Muller <Gilles.Muller@...6.fr>
Cc: Nicolas Palix <nicolas.palix@...g.fr>
Cc: Grant Likely <grant.likely@...aro.org>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: devicetree@...r.kernel.org
Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
---
scripts/coccinelle/misc/of_table.cocci | 81 ++++++++++++++++++++++++++++++++++
1 file changed, 81 insertions(+)
create mode 100644 scripts/coccinelle/misc/of_table.cocci
diff --git a/scripts/coccinelle/misc/of_table.cocci b/scripts/coccinelle/misc/of_table.cocci
new file mode 100644
index 000000000000..da8bfa69fa3e
--- /dev/null
+++ b/scripts/coccinelle/misc/of_table.cocci
@@ -0,0 +1,81 @@
+/// Make sure of_device_id tables are NULL terminated
+//
+// Keywords: of_table
+// Confidence: Medium
+// Options: --include-headers
+
+virtual patch
+virtual context
+virtual org
+virtual report
+
+@..._of_table exists@
+identifier var, arr;
+expression E;
+@@
+... struct of_device_id arr[] = {
+ ...,
+ {
+ ...,
+ .var = E,
+ ...
+ }
+};
+
+@...ends on bad_of_table && context@
+identifier var, arr;
+expression E;
+@@
+ ... struct of_device_id arr[] = {
+ ...,
+ {
+ ...,
+* .var = E,
+ ...
+ }
+};
+
+@...ends on bad_of_table && patch@
+identifier var, arr;
+expression E;
+@@
+... struct of_device_id arr[] = {
+ ...,
+ {
+ ...,
+ .var = E,
+ ...
+- }
++ },
++ { }
+};
+
+@r depends on bad_of_table exists@
+position p1;
+identifier var, arr;
+expression E;
+@@
+... struct of_device_id arr[] = {
+ ...,
+ {
+ ...,
+ .var = E,
+ ...
+ }
+ @p1
+};
+
+@...ipt:python depends on org@
+p1 << r.p1;
+arr << r.arr;
+@@
+
+cocci.print_main(arr,p1)
+
+@...ipt:python depends on report@
+p1 << r.p1;
+arr << r.arr;
+@@
+
+msg = "%s is not NULL terminated at line %s" % (arr, p1[0].line)
+coccilib.report.print_report(p1[0],msg)
--
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