ACPI: Make sure the FADT is at least rev 2 before using the reset register
The reset register was only introduced with version 2 of the FADT, so we should check that the FADT revision before trusting its contents. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Len Brown <len.brown@intel.com>
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@ -15,6 +15,11 @@ void acpi_reboot(void)
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rr = &acpi_gbl_FADT.reset_register;
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rr = &acpi_gbl_FADT.reset_register;
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/* ACPI reset register was only introduced with v2 of the FADT */
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if (acpi_gbl_FADT.header.revision < 2)
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return;
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/* Is the reset register supported? The spec says we should be
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/* Is the reset register supported? The spec says we should be
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* checking the bit width and bit offset, but Windows ignores
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* checking the bit width and bit offset, but Windows ignores
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* these fields */
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* these fields */
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