On Tue, 27 May 2014 11:04:18 -0700, Stephen Boyd <[email protected]> wrote:
> 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 <[email protected]>
> Cc: Julia Lawall <[email protected]>
> Cc: Gilles Muller <[email protected]>
> Cc: Nicolas Palix <[email protected]>
> Cc: Grant Likely <[email protected]>
> Cc: Rob Herring <[email protected]>
> Cc: [email protected]
> Signed-off-by: Stephen Boyd <[email protected]>
Looks good to me:
Acked-by: Grant Likely <[email protected]>
> ---
> scripts/coccinelle/misc/of_table.cocci | 73 ++++++++++++++++++++++++++++++++++
> 1 file changed, 73 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..838c74c418c9
> --- /dev/null
> +++ b/scripts/coccinelle/misc/of_table.cocci
> @@ -0,0 +1,73 @@
> +/// 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
> +
> +@bad_of_table exists@
> +identifier var, arr;
> +expression E;
> +@@
> +struct of_device_id arr[] = {
> + ...,
> + {
> + .var = E,
> + }
> +};
> +
> +@depends on bad_of_table && context@
> +identifier var, arr;
> +expression E;
> +@@
> +struct of_device_id arr[] = {
> + ...,
> + {
> +* .var = E,
> + }
> +};
> +
> +@depends 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
> +};
> +
> +@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)
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> hosted by The Linux Foundation
>