On 09/07/2015 09:32 AM, Sudeep Holla wrote: > Hi Al, > > On 19/08/15 23:07, Al Stone wrote: > > I finally got a chance to try this series on Juno. Well it exposed a firmware > bug in MADT table :) > > [..] > >> acpi_tbl_entry_handler handler, >> @@ -245,6 +484,8 @@ acpi_parse_entries(char *id, unsigned long table_size, >> table_end) { >> if (entry->type == entry_id >> && (!max_entries || count < max_entries)) { >> + if (bad_madt_entry(table_header, entry)) >> + return -EINVAL; > > Not sure if we can have the above check here unconditionally. > Currently I can see there are 2 other users of acpi_parse_entries i.e. > PCC and NUMA. So may be it can be made conditional or return success for > non-MADT tables from bad_madt_entry ? So, I went back and double checked the other users and they're looking at the return value for acpi_parse_entries properly; adding in the check above unconditionally should not cause any behavior change. Further, despite the name, acpi_parse_entries is only used to examine MADT subtables. Granted, we should probably make the name clearer at some point (too ambiguous as to which entries are parsed right now). Nonetheless, current usage seems to be in order. -- ciao, al ----------------------------------- Al Stone Software Engineer Red Hat, Inc. ahs3@xxxxxxxxxx ----------------------------------- -- To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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