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There is a race between resume from hibernation and the EC driver that may result in restoring the hibernation image in the middle of an EC transaction in progress, which in turn may lead to unpredictable behavior of the platform. To remove that race condition, add a helpers for suspending and resuming EC transactions in a safe way to be executed by the ACPI platform hibernate pre-restore and restore cleanup callbacks. http://bugzilla.kernel.org/show_bug.cgi?id=14668 Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Reported-and-tested-by: Maxim Levitsky <maximlevitsky@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
67 lines
2.5 KiB
C
67 lines
2.5 KiB
C
/*
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* acpi/internal.h
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* For use by Linux/ACPI infrastructure, not drivers
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*
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* Copyright (c) 2009, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#define PREFIX "ACPI: "
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int init_acpi_device_notify(void);
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int acpi_scan_init(void);
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int acpi_system_init(void);
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#ifdef CONFIG_ACPI_DEBUG
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int acpi_debug_init(void);
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#else
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static inline int acpi_debug_init(void) { return 0; }
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#endif
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/* --------------------------------------------------------------------------
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Power Resource
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-------------------------------------------------------------------------- */
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int acpi_power_init(void);
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int acpi_device_sleep_wake(struct acpi_device *dev,
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int enable, int sleep_state, int dev_state);
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int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state);
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int acpi_disable_wakeup_device_power(struct acpi_device *dev);
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int acpi_power_get_inferred_state(struct acpi_device *device);
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int acpi_power_transition(struct acpi_device *device, int state);
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extern int acpi_power_nocheck;
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int acpi_wakeup_device_init(void);
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void acpi_early_processor_set_pdc(void);
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/* --------------------------------------------------------------------------
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Embedded Controller
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-------------------------------------------------------------------------- */
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int acpi_ec_init(void);
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int acpi_ec_ecdt_probe(void);
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int acpi_boot_ec_enable(void);
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void acpi_ec_suspend_transactions(void);
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void acpi_ec_resume_transactions(void);
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/*--------------------------------------------------------------------------
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Suspend/Resume
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-------------------------------------------------------------------------- */
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extern int acpi_sleep_init(void);
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#ifdef CONFIG_ACPI_SLEEP
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int acpi_sleep_proc_init(void);
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#else
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static inline int acpi_sleep_proc_init(void) { return 0; }
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#endif
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