linux-kernel - [PATCH 0/2] ACPICA: Events: Fix GPE enabling issues related to edge-triggered GPEs

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Date:   Fri, 11 Aug 2017 13:57:23 +0800
From:   Lv Zheng <lv.zheng@...el.com>
To:     "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Len Brown <len.brown@...el.com>,
        Robert Moore <robert.moore@...el.com>,
        Lv Zheng <lv.zheng@...el.com>,
        "David E . Box" <david.e.box@...el.com>
Cc:     Lv Zheng <zetalog@...il.com>, linux-kernel@...r.kernel.org,
        linux-acpi@...r.kernel.org, devel@...ica.org
Subject: [PATCH 0/2] ACPICA: Events: Fix GPE enabling issues related to edge-triggered GPEs

There are 2 issues related to the enabling of GPEs:
1. Currently, our code clears GPE before enabling it. In case of edge
   triggered GPEs, doing this risks GPE losses.
2. For edge-triggered GPEs, enabling it is not sufficiently to trigger an
   already triggered GPE, we need to poll the GPE once it is enabled.
This patchset fixes these 2 problems.

Lv Zheng (2):
  ACPICA: Events: Stop unconditionally clearing ACPI IRQs during
    suspend/resume
  ACPICA: Events: Dispatch GPEs after enabling for the first time

 drivers/acpi/acpica/evgpe.c     |  7 -------
 drivers/acpi/acpica/evxfgpe.c   | 22 ++++++++++++++++++++++
 drivers/acpi/acpica/hwgpe.c     |  1 -
 drivers/acpi/acpica/hwsleep.c   | 11 ++---------
 drivers/acpi/acpica/hwxfsleep.c |  2 +-
 5 files changed, 25 insertions(+), 18 deletions(-)

-- 
2.7.4