Commit ae56c9fd authored Jun 15, 2017 by Lv Zheng Committed by Rafael J. Wysocki Jun 29, 2017

ACPI / EC: Enhance boot EC sanity check

It's reported that some buggy BIOS tables can contain 2 DSDT ECs, one of
them is invalid but acpi_ec_dsdt_probe() fails to pick the valid one.
This patch simply enhances sanity checks in ec_parse_device() as a
workaround to skip probing wrong namespace ECs.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=195651


Tested-by: Daniel Drake <drake@endlessm.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent 4625d752

drivers/acpi/ec.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1363,6 +1363,8 @@ ec_parse_device(acpi_handle handle, u32 Level, void context, void *retval)
		ec_parse_io_ports, ec);
		if (ACPI_FAILURE(status))
		return status;
		if (ec->data_addr == 0 \|\| ec->command_addr == 0)
		return AE_OK;

		/* Get GPE bit assignment (EC events). */
		/* TODO: Add support for _GPE returning a package */

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