Commit b3b233c7 authored by Alexey Starikovskiy's avatar Alexey Starikovskiy Committed by Len Brown

ACPI: EC: Some hardware requires burst mode to operate properly

Burst mode temporary (50 ms) locks EC to do only transactions with
driver, without it some hardware returns abstract garbage.

Reference: http://bugzilla.kernel.org/show_bug.cgi?id=9341Signed-off-by: default avatarAlexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 3e71a87d
......@@ -575,6 +575,8 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address,
if (bits != 8 && acpi_strict)
return AE_BAD_PARAMETER;
acpi_ec_burst_enable(ec);
if (function == ACPI_READ) {
result = acpi_ec_read(ec, address, &temp);
*value = temp;
......@@ -594,6 +596,8 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address,
}
}
acpi_ec_burst_disable(ec);
switch (result) {
case -EINVAL:
return AE_BAD_PARAMETER;
......
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