ACPI, APEI, EINJ Allow empty Trigger Error Action Table
According to the ACPI spec [1] section 18.6.4 the TRIGGER_ERROR action table can consists of zero elements. [1] Advanced Configuration and Power Interface Specification Revision 5.0, December 6, 2011 http://www.acpi.info/DOWNLOADS/ACPIspec50.pdf Signed-off-by: Niklas Söderlund <niklas.soderlund@ericsson.com> Acked-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
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1 changed files with 6 additions and 1 deletions
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@ -276,7 +276,7 @@ static int einj_check_trigger_header(struct acpi_einj_trigger *trigger_tab)
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if (trigger_tab->header_size != sizeof(struct acpi_einj_trigger))
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return -EINVAL;
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if (trigger_tab->table_size > PAGE_SIZE ||
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trigger_tab->table_size <= trigger_tab->header_size)
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trigger_tab->table_size < trigger_tab->header_size)
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return -EINVAL;
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if (trigger_tab->entry_count !=
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(trigger_tab->table_size - trigger_tab->header_size) /
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@ -340,6 +340,11 @@ static int __einj_error_trigger(u64 trigger_paddr, u32 type,
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"The trigger error action table is invalid\n");
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goto out_rel_header;
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}
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/* No action structures in the TRIGGER_ERROR table, nothing to do */
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if (!trigger_tab->entry_count)
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goto out_rel_header;
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rc = -EIO;
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table_size = trigger_tab->table_size;
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r = request_mem_region(trigger_paddr + sizeof(*trigger_tab),
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