> >> @@ -47,6 +49,26 @@ void __init __acpi_unmap_table(char *map, unsigned long size)
> >> early_memunmap(map, size);
> >> }
> >>
> >> +static int __init acpi_parse_fadt(struct acpi_table_header *table)
> >> +{
> >> + struct acpi_table_fadt *fadt = (struct acpi_table_fadt *)table;
> >> +
> >> + /*
> >> + * Revision in table header is the FADT Major version,
> >> + * and there is a minor version of FADT which was introduced
> >> + * by ACPI 5.1, we only deal with ACPI 5.1 or higher version
> >> + * to get arm boot flags, or we will disable ACPI.
> >> + */
> >> + if (table->revision < 5 || fadt->minor_revision < 1) {
> >
> > If we ever get revision 6.0, this would trigger.
>
> Yes, good catch, actually I already fixed that in my local git repo,
>
> + if (table->revision > 5 ||
> + (table->revision == 5 && fadt->minor_revision >= 1)) {
> + return 0;
> + } else {
> + pr_info("FADT revision is %d.%d, no PSCI support, should be 5.1
> or higher\n",
> + table->revision, fadt->minor_revision);
> + disable_acpi();
> + return -EINVAL;
> + }
Given you return in the first path, you don't need the remaining code to
live in an else block.
Mark.
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