diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2018-08-08 10:30:03 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-08-09 11:04:26 +0200 |
| commit | 5971b0c1594d6c34e257101ed5fdffec65205c50 (patch) | |
| tree | 8f9b04a18051b58999a3f893f90e42791a76240b /drivers/acpi/scan.c | |
| parent | a6f0729508df6a067c4a074ec187ecd9d2457a6b (diff) | |
| download | linux-5971b0c1594d6c34e257101ed5fdffec65205c50.tar.bz2 | |
ACPI / scan: Initialize status to ACPI_STA_DEFAULT
Since commit 63347db0affa "ACPI / scan: Use acpi_bus_get_status() to
initialize ACPI_TYPE_DEVICE devs" the status field of normal acpi_devices
gets set to 0 by acpi_bus_type_and_status() and filled with its actual
value later when acpi_add_single_object() calls acpi_bus_get_status().
This means that any acpi_match_device_ids() calls in between will always
fail with -ENOENT.
We already have a workaround for this, which temporary forces status to
ACPI_STA_DEFAULT in drivers/acpi/x86/utils.c: acpi_device_always_present()
and the next commit in this series adds another acpi_match_device_ids()
call between status being initialized as 0 and the acpi_bus_get_status()
call.
Rather then adding another workaround, this commit makes
acpi_bus_type_and_status() initialize status to ACPI_STA_DEFAULT, this is
safe to do as the only code looking at status between the initialization
and the acpi_bus_get_status() call is those acpi_match_device_ids() calls.
Note this does mean that we need to (re)set status to 0 in case the
acpi_bus_get_status() call fails.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/scan.c')
| -rw-r--r-- | drivers/acpi/scan.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 199c8ea6896c..798a73416af8 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1612,7 +1612,8 @@ static int acpi_add_single_object(struct acpi_device **child, * Note this must be done before the get power-/wakeup_dev-flags calls. */ if (type == ACPI_BUS_TYPE_DEVICE) - acpi_bus_get_status(device); + if (acpi_bus_get_status(device) < 0) + acpi_set_device_status(device, 0); acpi_bus_get_power_flags(device); acpi_bus_get_wakeup_device_flags(device); @@ -1690,7 +1691,7 @@ static int acpi_bus_type_and_status(acpi_handle handle, int *type, * acpi_add_single_object updates this once we've an acpi_device * so that acpi_bus_get_status' quirk handling can be used. */ - *sta = 0; + *sta = ACPI_STA_DEFAULT; break; case ACPI_TYPE_PROCESSOR: *type = ACPI_BUS_TYPE_PROCESSOR; |