linux-dev/drivers/acpi/acpica/utdelete.c, branch linus/master

ACPICA: Utilities: Avoid deleting the same object twice in a row

2021-12-27T16:01:28Z

ACPICA commit c11af67d8f7e3d381068ce7771322f2b5324d687 If original_count is 0 in acpi_ut_update_ref_count (), acpi_ut_delete_internal_obj () is invoked for the target object, which is incorrect, because that object has been deleted once already and the memory allocated to store it may have been reclaimed and allocated for a different purpose by the host OS. Moreover, a confusing debug message following the "Reference Count is already zero, cannot decrement" warning is printed in that case. To fix this issue, make acpi_ut_update_ref_count () return after finding that original_count is 0 and printing the above warning. Link: https://github.com/acpica/acpica/commit/c11af67d Link: https://github.com/acpica/acpica/pull/652 Reported-by: Mark Asselstine Signed-off-by: Rafael J. Wysocki Signed-off-by: Bob Moore Signed-off-by: Rafael J. Wysocki

ACPICA: Clean up context mutex during object deletion

2021-05-31T11:56:33Z

ACPICA commit bc43c878fd4ff27ba75b1d111b97ee90d4a82707 Fixes: c27f3d011b08 ("Fix race in GenericSerialBus (I2C) and GPIO OpRegion parameter handling") Link: https://github.com/acpica/acpica/commit/bc43c878 Reported-by: John Garry Reported-by: Xiang Chen Tested-by: Xiang Chen Signed-off-by: Erik Kaneda Signed-off-by: Bob Moore Signed-off-by: Rafael J. Wysocki

ACPICA: fix -Wfallthrough

2021-01-22T14:51:30Z

ACPICA commit 4b9135f5774caa796ddf826448811e8e7f08ef2f GCC 7.1 gained -Wimplicit-fallthrough to warn on implicit fallthrough, as well as __attribute__((__fallthrough__)) and comments to explicitly denote that cases of fallthrough were intentional. Clang also supports this warning and statement attribute, but not the comment form. Robert Moore provides additional context about the lint comments being removed. They were for "an old version of PC-Lint, which we don't use anymore." Drop those. This will help us enable -Wimplicit-fallthrough throughout the Linux kernel. Suggested-by: Robert Moore Reported-by: Jon Hunter Link: https://github.com/acpica/acpica/commit/4b9135f5 Signed-off-by: Nick Desaulniers Signed-off-by: Bob Moore Signed-off-by: Erik Kaneda Signed-off-by: Rafael J. Wysocki

ACPICA: Do not increment operation_region reference counts for field units

2020-07-27T12:55:42Z

ACPICA commit e17b28cfcc31918d0db9547b6b274b09c413eb70 Object reference counts are used as a part of ACPICA's garbage collection mechanism. This mechanism keeps track of references to heap-allocated structures such as the ACPI operand objects. Recent server firmware has revealed that this reference count can overflow on large servers that declare many field units under the same operation_region. This occurs because each field unit declaration will add a reference count to the source operation_region. This change solves the reference count overflow for operation_regions objects by preventing fieldunits from incrementing their operation_region's reference count. Each operation_region's reference count will not be changed by named objects declared under the Field operator. During namespace deletion, the operation_region namespace node will be deleted and each fieldunit will be deleted without touching the deleted operation_region object. Link: https://github.com/acpica/acpica/commit/e17b28cf Signed-off-by: Erik Kaneda Signed-off-by: Bob Moore Signed-off-by: Rafael J. Wysocki

ACPICA: Fixes for acpiExec namespace init file

2020-03-30T12:52:33Z

This is the result of squashing the following ACPICA commit ID's: 6803997e5b4f3635cea6610b51ff69e29d251de3 f31cdf8bfda22fe265c1a176d0e33d311c82a7f7 This change fixes several problems with the support for the acpi_exec namespace init file (-fi option). Specifically, it fixes AE_ALREADY_EXISTS errors, as well as various seg faults. Link: https://github.com/acpica/acpica/commit/f31cdf8b Link: https://github.com/acpica/acpica/commit/6803997e Signed-off-by: Bob Moore Signed-off-by: Erik Kaneda Signed-off-by: Rafael J. Wysocki

ACPICA: ACPI 6.3: add PCC operation region support for AML interpreter

2019-02-24T20:11:20Z

ACPICA commit a4849944e80f97970e99843f4975850753584a4e This change adds PCC operation region support in the AML interpreter and a default handler for acpiexec. According to the specification, the PCC operation region performs a transaction when the COMD field is written. This allows ASL to write data to other fields before sending the data. In order to accommodate this protocol, a temorary buffer is added to the regionfield object to accumulate writes. If any offset that spans COMD is written, the temporary buffer is sent to the PCC operation region handler to be processed. This change also renames the PCC keyword to platform_comm_channel. Link: https://github.com/acpica/acpica/commit/a4849944 Reviewed-by: Kyle Pelton Signed-off-by: Erik Schmauss Signed-off-by: Bob Moore Signed-off-by: Rafael J. Wysocki

ACPICA: Reference count: add additional debugging details

2018-08-14T21:49:13Z

Make reference counting diagnostics provide more information on what has happened. Signed-off-by: Erik Schmauss [ rjw: Changelog ] Signed-off-by: Rafael J. Wysocki

ACPICA: adding SPDX headers

2018-03-18T18:08:05Z

Signed-off-by: Erik Schmauss Signed-off-by: Rafael J. Wysocki

ACPICA: Update for some debug output. No functional change

2018-02-21T22:51:08Z

ACPICA commit 3a08436fe3bff297a6de162252964e955946c7d3 Improve/simplify some of the debug messages. Link: https://github.com/acpica/acpica/commit/3a08436f Signed-off-by: Bob Moore Signed-off-by: Erik Schmauss Signed-off-by: Rafael J. Wysocki

ACPICA: All acpica: Update copyrights to 2018

2018-02-06T09:31:20Z

including tool signons. Signed-off-by: Bob Moore Signed-off-by: Erik Schmauss Signed-off-by: Rafael J. Wysocki