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| author | Alexey Starikovskiy <astarikovskiy@novell.com> | 2007-08-24 08:10:11 +0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-08-24 00:30:59 -0400 |
| commit | f9319f903f898dd4b15dbc386499725ce6c59776 (patch) | |
| tree | d1ccc462cd73cf914cd3217057ca7be2ffcad368 /drivers/acpi/ec.c | |
| parent | b377fd3982ad957c796758a90e2988401a884241 (diff) | |
| download | linux-f9319f903f898dd4b15dbc386499725ce6c59776.tar.gz linux-f9319f903f898dd4b15dbc386499725ce6c59776.tar.bz2 linux-f9319f903f898dd4b15dbc386499725ce6c59776.zip | |
ACPI: EC: revert fix for bugzilla 8709
This is a manual revert of 7c010de7506954e973abfab5c5999c5a97f7a73e,
a fix that broke another ASUS in 8909 and 8919.
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 | 47 |
1 files changed, 31 insertions, 16 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 56bee9e065cf..43749c86861f 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -696,14 +696,6 @@ 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; @@ -727,13 +719,16 @@ 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) { - ec_remove_handlers(boot_ec); - mutex_destroy(&boot_ec->lock); - kfree(boot_ec); - first_ec = boot_ec = NULL; + /* 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); + mutex_unlock(&boot_ec->lock); + kfree(ec); + ec = boot_ec; } - } - if (!first_ec) + } else first_ec = ec; ec->handle = device->handle; acpi_driver_data(device) = ec; @@ -762,6 +757,9 @@ 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; } @@ -825,7 +823,9 @@ static int acpi_ec_start(struct acpi_device *device) if (!ec) return -EINVAL; - ret = ec_install_handlers(ec); + /* Boot EC is already working */ + if (ec != boot_ec) + ret = ec_install_handlers(ec); /* EC is fully operational, allow queries */ atomic_set(&ec->query_pending, 0); @@ -835,6 +835,7 @@ 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) @@ -843,7 +844,21 @@ static int acpi_ec_stop(struct acpi_device *device, int type) ec = acpi_driver_data(device); if (!ec) return -EINVAL; - ec_remove_handlers(ec); + + /* 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; + return 0; } |