linux.git/drivers/acpi/scan.c, branch v5.13

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

ACPI: scan: Utilize match_string() API

2021-04-12T17:34:12+00:00

We have already an API to match a string in the array of strings.
Utilize it instead of open coded analogues.

Signed-off-by: Andy Shevchenko 
Signed-off-by: Rafael J. Wysocki