linux-kernel - [PATCH v2 0/3] ACPICA: Interpreter: Fix regressions in lock order improvement

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Date:   Wed, 26 Oct 2016 15:39:55 +0800
From:   Lv Zheng <zetalog@...il.com>
To:     "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Len Brown <len.brown@...el.com>
Cc:     linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        Lv Zheng <lv.zheng@...el.com>
Subject: [PATCH v2 0/3] ACPICA: Interpreter: Fix regressions in lock order improvement

This patchset fixes regressions in ACPICA intepreter lock order
improvement.

Patches tested with customized ACPI table where _PS0/_PS3 methods are
customized to invoke a serialized control method which creates named
objects. When pm_async=yes, AE_ALREADY_EXISTS can be seen in suspend/resume
process. This is an existing issue, triggered in 4.9-rc1 by ACPICA
interpreter lock order fixes, and can be fixed by [PATCH 1] in this series.

v2:
1. Remove non-regression-fixes.
2. Add "Fixes" tags.

Lv Zheng (3):
  ACPICA: Dispatcher: Fix order issue of method termination
  ACPICA: Dispatcher: Fix an unbalanced lock exit path in
    acpi_ds_auto_serialize_method()
  ACPICA: Dispatcher: Tune interpreter lock around
    acpi_ev_initialize_region()

 drivers/acpi/acpica/dsinit.c   | 11 +++-------
 drivers/acpi/acpica/dsmethod.c | 50 +++++++++++++++++++-----------------------
 drivers/acpi/acpica/dswload2.c |  2 --
 drivers/acpi/acpica/evrgnini.c |  3 +++
 drivers/acpi/acpica/nsload.c   |  2 ++
 5 files changed, 30 insertions(+), 38 deletions(-)

-- 
2.7.4