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authorAlexey Starikovskiy <astarikivskiy@suse.de>2007-08-03 17:57:53 -0400
committerLen Brown <len.brown@intel.com>2007-08-03 17:57:53 -0400
commit7c010de7506954e973abfab5c5999c5a97f7a73e (patch)
treebfb188b086c2a912936883d47b0756f8755cbdef /drivers/acpi
parent52fe4bdf40bc07498c5f7935551774e8f8458190 (diff)
ACPI: EC: Switch from boot_ec as soon as we find its desc in DSDT.
Some ASUS laptops fail to use boot time EC and need to eventually switch to one described in DSDT. http://bugzilla.kernel.org/show_bug.cgi?id=8709 Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/ec.c45
1 files changed, 16 insertions, 29 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 629289034b6..71caa7d983a 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -679,6 +679,14 @@ ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
return AE_CTRL_TERMINATE;
}
+static void ec_remove_handlers(struct acpi_ec *ec)
+{
+ acpi_remove_address_space_handler(ec->handle,
+ ACPI_ADR_SPACE_EC,
+ &acpi_ec_space_handler);
+ acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler);
+}
+
static int acpi_ec_add(struct acpi_device *device)
{
struct acpi_ec *ec = NULL;
@@ -702,16 +710,15 @@ static int acpi_ec_add(struct acpi_device *device)
/* Check if we found the boot EC */
if (boot_ec) {
if (boot_ec->gpe == ec->gpe) {
- /* We might have incorrect info for GL at boot time */
mutex_lock(&boot_ec->lock);
- boot_ec->global_lock = ec->global_lock;
- /* Copy handlers from new ec into boot ec */
- list_splice(&ec->list, &boot_ec->list);
+ ec_remove_handlers(boot_ec);
mutex_unlock(&boot_ec->lock);
- kfree(ec);
- ec = boot_ec;
+ mutex_destroy(&boot_ec->lock);
+ kfree(boot_ec);
+ first_ec = boot_ec = NULL;
}
- } else
+ }
+ if (!first_ec)
first_ec = ec;
ec->handle = device->handle;
acpi_driver_data(device) = ec;
@@ -740,9 +747,6 @@ static int acpi_ec_remove(struct acpi_device *device, int type)
if (ec == first_ec)
first_ec = NULL;
- /* Don't touch boot EC */
- if (boot_ec != ec)
- kfree(ec);
return 0;
}
@@ -806,9 +810,7 @@ static int acpi_ec_start(struct acpi_device *device)
if (!ec)
return -EINVAL;
- /* Boot EC is already working */
- if (ec != boot_ec)
- ret = ec_install_handlers(ec);
+ ret = ec_install_handlers(ec);
/* EC is fully operational, allow queries */
atomic_set(&ec->query_pending, 0);
@@ -818,7 +820,6 @@ static int acpi_ec_start(struct acpi_device *device)
static int acpi_ec_stop(struct acpi_device *device, int type)
{
- acpi_status status;
struct acpi_ec *ec;
if (!device)
@@ -827,21 +828,7 @@ static int acpi_ec_stop(struct acpi_device *device, int type)
ec = acpi_driver_data(device);
if (!ec)
return -EINVAL;
-
- /* Don't touch boot EC */
- if (ec == boot_ec)
- return 0;
-
- status = acpi_remove_address_space_handler(ec->handle,
- ACPI_ADR_SPACE_EC,
- &acpi_ec_space_handler);
- if (ACPI_FAILURE(status))
- return -ENODEV;
-
- status = acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler);
- if (ACPI_FAILURE(status))
- return -ENODEV;
-
+ ec_remove_handlers(ec);
return 0;
}