kernel/git/stable/linux.git/drivers/acpi/scan.c, branch linux-5.13.y

ACPI: scan: Rearrange dep_unmet initialization

2021-07-14T15:06:30+00:00

[ Upstream commit 6d27975851b134be8d2a170437210c9719e524aa ] The dep_unmet field in struct acpi_device is used to store the number of unresolved _DEP dependencies (that is, operation region dependencies for which there are no drivers present) for the ACPI device object represented by it. That field is initialized to 1 for all ACPI device objects in acpi_add_single_object(), via acpi_init_device_object(), so as to avoid evaluating _STA prematurely for battery device objects in acpi_scan_init_status(), and it is "fixed up" in acpi_bus_check_add() after the acpi_add_single_object() called by it has returned. This is not particularly straightforward and causes dep_unmet to remain 1 for device objects without dependencies created by invoking acpi_add_single_object() directly, outside acpi_bus_check_add(). For this reason, rearrange acpi_add_single_object() to initialize dep_unmet completely before calling acpi_scan_init_status(), which requires passing one extra bool argument to it, and update all of its callers accordingly. Signed-off-by: Rafael J. Wysocki Reviewed-by: Hans de Goede Signed-off-by: Sasha Levin

ACPI: power: Refine turning off unused power resources

2021-05-24T14:08:17+00:00

Commit 7e4fdeafa61f ("ACPI: power: Turn off unused power resources unconditionally") dropped the power resource state check from acpi_turn_off_unused_power_resources(), because according to the ACPI specification (e.g. ACPI 6.4, Section 7.2.2) the OS "may run the _OFF method repeatedly, even if the resource is already off". However, it turns out that some systems do not follow the specification in this particular respect and that commit introduced boot issues on them, so refine acpi_turn_off_unused_power_resources() to only turn off power resources without any users after device enumeration and restore its previous behavior in the system-wide resume path. Fixes: 7e4fdeafa61f ("ACPI: power: Turn off unused power resources unconditionally") Link: https://uefi.org/specs/ACPI/6.4/07_Power_and_Performance_Mgmt/declaring-a-power-resource-object.html#off BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=213019 Reported-by: Zhang Rui Tested-by: Zhang Rui Reported-by: Dave Olsthoorn Tested-by: Dave Olsthoorn Reported-by: Shujun Wang Tested-by: Shujun Wang Signed-off-by: Rafael J. Wysocki

Merge branch 'acpi-pm'

2021-05-13T18:39:58+00:00

* acpi-pm: ACPI: PM: Add ACPI ID of Alder Lake Fan Revert "Revert "ACPI: scan: Turn off unused power resources during initialization""

ACPI: scan: Fix a memory leak in an error handling path

2021-05-10T17:02:55+00:00

If 'acpi_device_set_name()' fails, we must free 'acpi_device_bus_id->bus_id' or there is a (potential) memory leak. Fixes: eb50aaf960e3 ("ACPI: scan: Use unique number for instance_no") Signed-off-by: Christophe JAILLET Reviewed-by: Andy Shevchenko Signed-off-by: Rafael J. Wysocki

Revert "Revert "ACPI: scan: Turn off unused power resources during initialization""

2021-05-10T12:02:17+00:00

Revert commit 5db91e9cb5b3 ("Revert "ACPI: scan: Turn off unused power resources during initialization") which was not necessary. Signed-off-by: Rafael J. Wysocki

Merge branches 'acpi-pm' and 'acpi-docs'

2021-05-06T15:21:42+00:00

* acpi-pm: Revert "ACPI: scan: Turn off unused power resources during initialization" * acpi-docs: Documentation: firmware-guide: gpio-properties: Add note to SPI CS case

Revert "ACPI: scan: Turn off unused power resources during initialization"

2021-04-30T13:32:22+00:00

Revert commit 4b9ee772eaa8 ("ACPI: scan: Turn off unused power resources during initialization") that is reported to cause initialization issues to occur. Reported-by: Shujun Wang Signed-off-by: Rafael J. Wysocki

Merge branch 'acpi-misc'

2021-04-26T15:04:41+00:00

* acpi-misc: ACPI: dock: fix some coding style issues ACPI: sysfs: fix some coding style issues ACPI: PM: add a missed blank line after declarations ACPI: custom_method: fix a coding style issue ACPI: CPPC: fix some coding style issues ACPI: button: fix some coding style issues ACPI: battery: fix some coding style issues ACPI: acpi_pad: add a missed blank line after declarations ACPI: LPSS: add a missed blank line after declarations ACPI: ipmi: remove useless return statement for void function ACPI: processor: fix some coding style issues ACPI: APD: fix a block comment align issue ACPI: AC: fix some coding style issues ACPI: fix various typos in comments

Merge branches 'acpi-scan', 'acpi-drivers', 'acpi-pm' and 'acpi-resources'

2021-04-26T15:03:46+00:00

* acpi-scan: ACPI: bus: Introduce acpi_dev_get() and reuse it in ACPI code ACPI: scan: Utilize match_string() API ACPI: scan: Call acpi_get_object_info() from acpi_set_pnp_ids() ACPI: scan: Drop sta argument from acpi_init_device_object() ACPI: scan: Drop sta argument from acpi_add_single_object() ACPI: scan: Rearrange checks in acpi_bus_check_add() ACPI: scan: Fold acpi_bus_type_and_status() into its caller * acpi-drivers: ACPI: HED: Drop unused ACPI_MODULE_NAME() definition * acpi-pm: ACPI: power: Turn off unused power resources unconditionally ACPI: scan: Turn off unused power resources during initialization * acpi-resources: resource: Prevent irqresource_disabled() from erasing flags

ACPI: bus: Introduce acpi_dev_get() and reuse it in ACPI code

2021-04-13T13:41:11+00:00

Introduce acpi_dev_get() to have a symmetrical API with acpi_dev_put() and reuse both in ACPI code in drivers/acpi/. While at it, use acpi_bus_put_acpi_device() in one place instead of the above. Signed-off-by: Andy Shevchenko Signed-off-by: Rafael J. Wysocki