linux-toradex.git/drivers/acpi/utils.c, branch v3.14.3

ACPI / utils: remove a pointless NULL check

2014-02-05T00:05:24+00:00

"element" can't be NULL because it is the address of a struct member.

Signed-off-by: Dan Carpenter 
Signed-off-by: Rafael J. Wysocki

Merge branch 'acpi-dsm'

2014-01-12T22:45:52+00:00

* acpi-dsm:
  ACPI / extlog: replace open-coded _DSM code with helper functions
  ACPI / nouveau: replace open-coded _DSM code with helper functions
  nouveau / ACPI: fix memory leak in ACPI _DSM related code
  ACPI / i915: replace open-coded _DSM code with helper functions
  ACPI / i2c-hid: replace open-coded _DSM code with helper functions
  ACPI / TPM: detect PPI features by checking availability of _DSM functions
  ACPI / TPM: replace open-coded _DSM code with helper functions
  ACPI / TPM: match node name instead of full path when searching for TPM device
  PCI / pci-label: treat PCI label with index 0 as valid label
  ACPI / PCI: replace open-coded _DSM code with helper functions
  PCI / pci-label: release allocated ACPI object on error recovery path
  ACPI: introduce helper interfaces for _DSM method

ACPI: introduce helper interfaces for _DSM method

2014-01-05T15:07:14+00:00

There are several drivers making use of ACPI _DSM method to detect
and invoke device specific methods. Currently every driver has
implemented its private version to support ACPI _DSM method.
So this patch introduces three helper functions to support ACPI _DSM
method, which will be used to replace open-coded versions.

It helps to simplify code and improve code readability.

Signed-off-by: Jiang Liu 
Signed-off-by: Rafael J. Wysocki

ACPI: Clean up inclusions of ACPI header files

2013-12-07T00:03:14+00:00

Replace direct inclusions of ,  and
, which are incorrect, with 
inclusions and remove some inclusions of those files that aren't
necessary.

First of all, ,  and 
should not be included directly from any files that are built for
CONFIG_ACPI unset, because that generally leads to build warnings about
undefined symbols in !CONFIG_ACPI builds.  For CONFIG_ACPI set,
 includes those files and for CONFIG_ACPI unset it
provides stub ACPI symbols to be used in that case.

Second, there are ordering dependencies between those files that always
have to be met.  Namely, it is required that  be included
prior to  so that the acpi_pci_root declarations the
latter depends on are always there.  And  which provides
basic ACPICA type declarations should always be included prior to any other
ACPI headers in CONFIG_ACPI builds.  That also is taken care of including
 as appropriate.

Signed-off-by: Lv Zheng 
Cc: Greg Kroah-Hartman 
Cc: Matthew Garrett 
Cc: Tony Luck 
Cc: "H. Peter Anvin" 
Acked-by: Bjorn Helgaas  (drivers/pci stuff)
Acked-by: Konrad Rzeszutek Wilk  (Xen stuff)
Signed-off-by: Rafael J. Wysocki

ACPI: Fix spelling mistake in error messages

2013-10-29T23:02:42+00:00

Fix spelling mistake "expecing" --> "expecting"

Signed-off-by: Colin Ian King 
Signed-off-by: Rafael J. Wysocki

ACPI: improve acpi_extract_package() utility

2013-10-10T20:31:21+00:00

The current version requires one to know the size of the package
a priori; this is almost impossible if the package is composed of
strings of variable length.  This change allows the utility to
allocate a buffer of the proper size if asked.

Signed-off-by: Al Stone 
Signed-off-by: Rafael J. Wysocki

ACPI: introduce two helper functions for _EJ0 and _LCK

2013-07-14T23:33:10+00:00

Introduce two helper functions, acpi_evaluate_ej0() and
acpi_evaluate_lck(), that will execute the _EJ0 and _LCK ACPI
control methods, respectively, and use them to simplify the
ACPI scan code.

[rjw: Changelog]
Signed-off-by: Jiang Liu 
Signed-off-by: Rafael J. Wysocki

ACPI: introduce helper function acpi_execute_simple_method()

2013-07-14T23:33:10+00:00

Introduce helper function acpi_execute_simple_method() and use it in
a number of places to simplify code.

[rjw: Changelog]
Signed-off-by: Jiang Liu 
Signed-off-by: Rafael J. Wysocki

ACPI: introduce helper function acpi_has_method()

2013-07-14T23:33:10+00:00

Introduce helper function acpi_has_method() and use it in a number
of places to simplify code.

[rjw: Changelog]
Signed-off-by: Jiang Liu 
Signed-off-by: Rafael J. Wysocki

ACPI: Add acpi_handle_() interfaces

2012-11-21T22:20:22+00:00

This patch introduces acpi_handle_(), where  is
a kernel message level such as err/warn/info, to support improved
logging messages for ACPI, esp. hot-plug operations.
acpi_handle_() appends "ACPI" prefix and ACPI object path
to the messages.  This improves diagnosis of hotplug operations
since an error message in a log file identifies an object that
caused an issue.  This interface acquires the global namespace
mutex to obtain an object path.  In interrupt context, it shows
the object path as .

acpi_handle_() takes acpi_handle as an argument, which is
passed to ACPI hotplug notify handlers from the ACPICA.  Therefore,
it is always available unlike other kernel objects, such as device.

For example:
  acpi_handle_err(handle, "Device don't exist, dropping EJECT\n");
logs an error message like this at KERN_ERR.
  ACPI: \_SB_.SCK4.CPU4: Device don't exist, dropping EJECT

ACPI hot-plug drivers can use acpi_handle_() when they need
to identify a target ACPI object path in their messages, such as
error cases.  The usage model is similar to dev_().
acpi_handle_() can be used when a device is not created or
is invalid during hot-plug operations.  ACPI object path is also
consistent on the platform, unlike device name that gets incremented
over hotplug operations.

ACPI drivers should use dev_() when a device object is valid.
Device name provides more user friendly information, and avoids
acquiring the global ACPI namespace mutex.  ACPI drivers also
continue to use pr_() when they do not need to specify device
information, such as boot-up messages.

Note: ACPI_[WARNING|INFO|ERROR]() are intended for the ACPICA and
are not associated with the kernel message level.

Signed-off-by: Toshi Kani 
Tested-by: Vijay Mohan Pandarathil 
Signed-off-by: Rafael J. Wysocki