4.14-stable review patch. If anyone has any objections, please let me know.
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From: Hans de Goede hdegoede@redhat.com
[ Upstream commit 63347db0affadcbccd5613116ea8431c70139b3e ]
The acpi_get_bus_status wrapper for acpi_bus_get_status_handle has some code to handle certain device quirks, in some cases we also need this quirk handling for the initial _STA call.
Specifically on some devices calling _STA before all _DEP dependencies are met results in errors like these:
[ 0.123579] ACPI Error: No handler for Region [ECRM] (00000000ba9edc4c) [GenericSerialBus] (20170831/evregion-166) [ 0.123601] ACPI Error: Region GenericSerialBus (ID=9) has no handler (20170831/exfldio-299) [ 0.123618] ACPI Error: Method parse/execution failed _SB.I2C1.BAT1._STA, AE_NOT_EXIST (20170831/psparse-550)
acpi_get_bus_status already has code to avoid this, so by using it we also silence these errors from the initial _STA call.
Note that in order for the acpi_get_bus_status handling for this to work, we initialize dep_unmet to 1 until acpi_device_dep_initialize gets called, this means that battery devices will be instantiated with an initial status of 0. This is not a problem, acpi_bus_attach will get called soon after the instantiation anyways and it will update the status as first point of order.
Signed-off-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/acpi/scan.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-)
--- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1568,6 +1568,8 @@ void acpi_init_device_object(struct acpi device_initialize(&device->dev); dev_set_uevent_suppress(&device->dev, true); acpi_init_coherency(device); + /* Assume there are unmet deps until acpi_device_dep_initialize() runs */ + device->dep_unmet = 1; }
void acpi_device_add_finalize(struct acpi_device *device) @@ -1591,6 +1593,14 @@ static int acpi_add_single_object(struct }
acpi_init_device_object(device, handle, type, sta); + /* + * For ACPI_BUS_TYPE_DEVICE getting the status is delayed till here so + * that we can call acpi_bus_get_status() and use its quirk handling. + * Note this must be done before the get power-/wakeup_dev-flags calls. + */ + if (type == ACPI_BUS_TYPE_DEVICE) + acpi_bus_get_status(device); + acpi_bus_get_power_flags(device); acpi_bus_get_wakeup_device_flags(device);
@@ -1663,9 +1673,11 @@ static int acpi_bus_type_and_status(acpi return -ENODEV;
*type = ACPI_BUS_TYPE_DEVICE; - status = acpi_bus_get_status_handle(handle, sta); - if (ACPI_FAILURE(status)) - *sta = 0; + /* + * 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; break; case ACPI_TYPE_PROCESSOR: *type = ACPI_BUS_TYPE_PROCESSOR; @@ -1763,6 +1775,8 @@ static void acpi_device_dep_initialize(s acpi_status status; int i;
+ adev->dep_unmet = 0; + if (!acpi_has_method(adev->handle, "_DEP")) return;