ACPICA: acpi_reset: Bypass port validation mechanism
Allow writes to reserved ports. This change may eventually be driven down in to acpi_write and acpi_read. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
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@ -78,9 +78,22 @@ acpi_status acpi_reset(void)
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return_ACPI_STATUS(AE_NOT_EXIST);
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}
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/* Write the reset value to the reset register */
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if (reset_reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
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/*
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* For I/O space, write directly to the OSL. This bypasses the port
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* validation mechanism, which may block a valid write to the reset
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* register.
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*/
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status =
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acpi_os_write_port((acpi_io_address) reset_reg->address,
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acpi_gbl_FADT.reset_value,
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reset_reg->bit_width);
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} else {
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/* Write the reset value to the reset register */
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status = acpi_hw_write(acpi_gbl_FADT.reset_value, reset_reg);
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}
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status = acpi_hw_write(acpi_gbl_FADT.reset_value, reset_reg);
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return_ACPI_STATUS(status);
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}
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