kernel/linux.git/drivers/acpi/sysfs.c, branch v4.4.171

ACPI / sysfs: fix error code in get_status()

2016-09-07T06:32:45+00:00

commit f18ebc211e259d4f591e39e74b2aa2de226c9a1d upstream. The problem with ornamental, do-nothing gotos is that they lead to "forgot to set the error code" bugs. We should be returning -EINVAL here but we don't. It leads to an uninitalized variable in counter_show(): drivers/acpi/sysfs.c:603 counter_show() error: uninitialized symbol 'status'. Fixes: 1c8fce27e275 (ACPI: introduce drivers/acpi/sysfs.c) Signed-off-by: Dan Carpenter Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman

ACPI / sysfs: correctly check failing memory allocation

2015-10-26T03:57:27+00:00

Since kobject_create_and_add() can fail under memory pressure, its return value needs to be checked against NULL before passing it to sysfs_create_file(). Signed-off-by: Insu Yun [ rjw: Subject & changelog ] Signed-off-by: Rafael J. Wysocki

ACPI / sysfs: Add support to allow leading "\" missing in trace_method_name.

2015-08-07T00:42:22+00:00

Since _SB.PCI0 can be used as relative path from root and can be easily converted into internal trace_method_name format, we allow users to specify trace_method_name using relative paths from root. Note this is useful for grub2 for which users failed to pass "\" from the grub configuration file. Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki

ACPI / sysfs: Update method tracing facility.

2015-08-07T00:42:21+00:00

This patch updates the method tracing facility as the acpi_debug_trace() API has been updated to allow it to trace AML interpreter execution, the meanings and the usages of the API parameters are changed due to the updates. The new API: 1. Uses ACPI_TRACE_ENABLED flag to indicate the enabling of the tracer; 2. Allows tracer still can be enabled when method name is not specified so that the AML interpreter execution can be traced without knowing the method name, which is useful for kernel boot tracing; 3. Supports arbitrary full path name, it doesn't need to be a name related to an entrance of acpi_evaluate_object(). Note that the sysfs parameters are also updated so that when reading the attribute files, ACPICA internal settings are returned. In order to make the sysfs parameters (acpi.trace_state) available during boot, this patch adds code to bypass ACPICA semaphore/mutex invocations when acpi mutex utilities haven't been initialized. This patch doesn't update documentation of method tracing facility, it will be updated by further patches. Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki

ACPI / sysfs: Add ACPI_LV_REPAIR debug level.

2015-08-07T00:42:21+00:00

This patch updates debug_level file, adding ACPI_LV_REPAIR. Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki

ACPI / sysfs: Treat the count field of counter_show() as unsigned

2015-03-10T00:03:30+00:00

The count field is an unsigned 32bit value, and the counter_show() function should also treat it as a unsigned value. Otherwise the counter may show negative number as we found on a machine: ... gpe23: 0 invalid gpe24: -2071733 enabled gpe25: 0 invalid ... gpe_all: -2070980 sci: -2070949 Signed-off-by: Nan Li Signed-off-by: Lee, Chun-Yi Signed-off-by: Rafael J. Wysocki

ACPICA: Events: Reduce source code difference for the ACPI_EVENT_FLAG_HANDLE renaming.

2014-10-20T22:39:40+00:00

This patch is partial linuxized result of the following ACPICA commit: ACPICA commit: a73b66c6aa1846d055bb6390d9c9b9902f7d804d Subject: Add "has handler" flag to event/gpe status interfaces. This change adds a new flag, ACPI_EVENT_FLAGS_HAS_HANDLER to the acpi_get_event_status and acpi_get_gpe_status external interfaces. It is set if the event/gpe currently has a handler associated with it. This patch contains the code to rename ACPI_EVENT_FLAG_HANDLE to ACPI_EVENT_FLAG_HAS_HANDLER, and the corresponding updates of its usages. Link: https://github.com/acpica/acpica/commit/a73b66c6 Signed-off-by: Lv Zheng Signed-off-by: Bob Moore Signed-off-by: Rafael J. Wysocki

ACPI: Remove duplicate definitions of PREFIX

2014-03-19T01:01:57+00:00

We already have a macro for PREFIX of "ACPI: " in drivers/acpi/internal.h, so remove the duplicate ones in ACPI drivers when internal.h is included. Signed-off-by: Hanjun Guo Signed-off-by: Rafael J. Wysocki

Merge branches 'acpi-processor', 'acpi-hotplug', 'acpi-init', 'acpi-pm' and 'acpica'

2014-01-29T10:47:18+00:00

* acpi-processor: ACPI / scan: reduce log level of "ACPI: \_PR_.CPU4: failed to get CPU APIC ID" ACPI / processor: Return specific error value when mapping lapic id * acpi-hotplug: ACPI / scan: Clear match_driver flag in acpi_bus_trim() * acpi-init: ACPI / init: Flag use of ACPI and ACPI idioms for power supplies to regulator API * acpi-pm: ACPI / PM: Use ACPI_COMPANION() to get ACPI companions of devices * acpica: ACPICA: Remove bool usage from ACPICA.

ACPICA: Remove bool usage from ACPICA.

2014-01-27T22:59:08+00:00

The use of "bool" is not safe for ACPICA code where it is originally using a "BOOLEAN" defined as "unsigned char". This patch removes the only "bool" usage from kernel source tree to reduce the source code differences between Linux and ACPICA upstream. This patch is required by future acpidump release automation. Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki