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authorRafael J. Wysocki <rjw@sisk.pl>2010-03-04 03:52:58 +0300
committerLen Brown <len.brown@intel.com>2010-03-08 22:15:51 +0300
commitf6bb13aa1ea3bb26a4c783822347873f085b9000 (patch)
treee0350530685e0719d4318f052982aa4340a00650 /drivers/acpi/internal.h
parent60b341b778cc2929df16c0a504c91621b3c6a4ad (diff)
downloadlinux-f6bb13aa1ea3bb26a4c783822347873f085b9000.tar.xz
ACPI / EC / PM: Close race between EC and resume from hibernation
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>
Diffstat (limited to 'drivers/acpi/internal.h')
-rw-r--r--drivers/acpi/internal.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index cb28e0502acc..78742460f1fc 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -51,6 +51,8 @@ void acpi_early_processor_set_pdc(void);
int acpi_ec_init(void);
int acpi_ec_ecdt_probe(void);
int acpi_boot_ec_enable(void);
+void acpi_ec_suspend_transactions(void);
+void acpi_ec_resume_transactions(void);
/*--------------------------------------------------------------------------
Suspend/Resume