ACPICA: acpi_reset: Bypass port validation mechanism (8a964236) · Commits · 戴 / test

Allow writes to reserved ports. This change may eventually be driven down in to acpi_write and acpi_read. Signed-off-by:

drivers/acpi/acpica/hwxface.c

+15 −2

Original line number	Diff line number	Diff line
		@@ -78,9 +78,22 @@ acpi_status acpi_reset(void)
		return_ACPI_STATUS(AE_NOT_EXIST);
		}

		if (reset_reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
		/*
		* For I/O space, write directly to the OSL. This bypasses the port
		* validation mechanism, which may block a valid write to the reset
		* register.
		*/
		status =
		acpi_os_write_port((acpi_io_address) reset_reg->address,
		acpi_gbl_FADT.reset_value,
		reset_reg->bit_width);
		} else {
		/* Write the reset value to the reset register */

		status = acpi_hw_write(acpi_gbl_FADT.reset_value, reset_reg);
		}

		return_ACPI_STATUS(status);
		}