diff options
| author | Lv Zheng <lv.zheng@intel.com> | 2017-06-15 09:41:35 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-06-29 00:00:01 +0200 |
| commit | ae56c9fd1518f9ac8def938638aebd2d7d289325 (patch) | |
| tree | 48e1665fbc51a5320943b1de21f1db737bf1e55f /drivers/acpi | |
| parent | 4625d752e600c116e6327f9d7fc16e8f5be107e9 (diff) | |
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>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/ec.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index f3ff5919e399..b4fd026c8229 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -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 */ |