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authorStephen Boyd <sboyd@codeaurora.org>2014-06-03 22:25:27 +0400
committerMichal Marek <mmarek@suse.cz>2014-06-10 01:39:16 +0400
commit2d5c5dbb48253f1729dc09f266a98bd2d7e694cb (patch)
treead8b0e9a885904c216831ee70fc50e262b279baa /scripts
parent9b24a15d81f4b7cd50c3cf13c0e753c865e345df (diff)
downloadlinux-2d5c5dbb48253f1729dc09f266a98bd2d7e694cb.tar.xz
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 pattern initially. Cc: Mitchel Humpherys <mitchelh@codeaurora.org> Cc: Gilles Muller <Gilles.Muller@lip6.fr> Cc: Nicolas Palix <nicolas.palix@imag.fr> Cc: Rob Herring <robh+dt@kernel.org> Cc: devicetree@vger.kernel.org Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Acked-by: Grant Likely <grant.likely@linaro.org> Signed-off-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/coccinelle/misc/of_table.cocci62
1 files changed, 62 insertions, 0 deletions
diff --git a/scripts/coccinelle/misc/of_table.cocci b/scripts/coccinelle/misc/of_table.cocci
new file mode 100644
index 000000000000..3c934046a060
--- /dev/null
+++ b/scripts/coccinelle/misc/of_table.cocci
@@ -0,0 +1,62 @@
+/// 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
+
+@depends on context@
+identifier var, arr;
+expression E;
+@@
+struct of_device_id arr[] = {
+ ...,
+ {
+ .var = E,
+* }
+};
+
+@depends on patch@
+identifier var, arr;
+expression E;
+@@
+struct of_device_id arr[] = {
+ ...,
+ {
+ .var = E,
+- }
++ },
++ { }
+};
+
+@r depends on org || report@
+position p1;
+identifier var, arr;
+expression E;
+@@
+struct of_device_id arr[] = {
+ ...,
+ {
+ .var = E,
+ }
+ @p1
+};
+
+@script:python depends on org@
+p1 << r.p1;
+arr << r.arr;
+@@
+
+cocci.print_main(arr,p1)
+
+@script: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)