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| author | Alexey Starikovskiy <astarikivskiy@suse.de> | 2007-08-03 17:57:53 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-08-03 17:57:53 -0400 |
| commit | 7c010de7506954e973abfab5c5999c5a97f7a73e (patch) | |
| tree | bfb188b086c2a912936883d47b0756f8755cbdef /drivers/acpi/ec.c | |
| parent | 52fe4bdf40bc07498c5f7935551774e8f8458190 (diff) | |
| download | linux-3.10-7c010de7506954e973abfab5c5999c5a97f7a73e.tar.gz linux-3.10-7c010de7506954e973abfab5c5999c5a97f7a73e.tar.bz2 linux-3.10-7c010de7506954e973abfab5c5999c5a97f7a73e.zip | |
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/ec.c')
| -rw-r--r-- | drivers/acpi/ec.c | 45 |
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; } |