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Subject[PATCH 3/6] ACPI: EC: Drop AE_NOT_FOUND special case from ec_install_handlers()
Date
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>

If the status value returned by acpi_install_address_space_handler()
in ec_install_handlers() is AE_NOT_FOUND, it is treated in a special
way, apparently because it might mean a _REG method evaluation
failure (at least that is the case according to the comment in
there), but acpi_install_address_space_handler() does not take
_REG evaluation errors into account at all, so the AE_NOT_FOUND
special handling is confusing at best.

For this reason, change ec_install_handlers() to stop the EC and
return -ENODEV on all acpi_install_address_space_handler() errors.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/acpi/ec.c | 15 ++-------------
1 file changed, 2 insertions(+), 13 deletions(-)

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 3153e7684053..6f501d552e6e 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -1489,19 +1489,8 @@ static int ec_install_handlers(struct acpi_ec *ec, struct acpi_device *device)
&acpi_ec_space_handler,
NULL, ec);
if (ACPI_FAILURE(status)) {
- if (status == AE_NOT_FOUND) {
- /*
- * Maybe OS fails in evaluating the _REG
- * object. The AE_NOT_FOUND error will be
- * ignored and OS * continue to initialize
- * EC.
- */
- pr_err("Fail in evaluating the _REG object"
- " of EC device. Broken bios is suspected.\n");
- } else {
- acpi_ec_stop(ec, false);
- return -ENODEV;
- }
+ acpi_ec_stop(ec, false);
+ return -ENODEV;
}
set_bit(EC_FLAGS_EC_HANDLER_INSTALLED, &ec->flags);
}
--
2.16.4




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