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A bugfix for Mutex handling. 

Originally reported by Takahiro Kambe and this fixed
powerdown on his Panasonic CF-R1N.
This fix is already reported to Intel ACPI-CA team, and will be
included in future releases of ACPI-CA.
This commit is contained in:
kochi 2004-04-07 18:19:33 +00:00
parent e31defb1fb
commit fa6f52f090
2 changed files with 4 additions and 2 deletions
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1
sys/dev/acpi/acpica/Subsystem/acobject.h
View File

@ -280,6 +280,7 @@ typedef struct acpi_object_mutex
{
ACPI_OBJECT_COMMON_HEADER
UINT16 SyncLevel;
UINT16 PreviousSyncLevel;
UINT16 AcquisitionDepth;
struct acpi_thread_state *OwnerThread;
void *Semaphore;

5
sys/dev/acpi/acpica/Subsystem/exmutex.c
View File

@ -116,7 +116,7 @@
*****************************************************************************/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: exmutex.c,v 1.12 2004/02/14 16:57:24 kochi Exp $");
__KERNEL_RCSID(0, "$NetBSD: exmutex.c,v 1.13 2004/04/07 18:19:34 kochi Exp $");
#define __EXMUTEX_C__
@ -288,6 +288,7 @@ AcpiExAcquireMutex (
ObjDesc->Mutex.OwnerThread = WalkState->Thread;
ObjDesc->Mutex.AcquisitionDepth = 1;
ObjDesc->Mutex.PreviousSyncLevel = WalkState->Thread->CurrentSyncLevel;
WalkState->Thread->CurrentSyncLevel = ObjDesc->Mutex.SyncLevel;
/* Link the mutex to the current thread for force-unlock at method exit */
@ -389,7 +390,7 @@ AcpiExReleaseMutex (
/* Update the mutex and walk state */
ObjDesc->Mutex.OwnerThread = NULL;
WalkState->Thread->CurrentSyncLevel = ObjDesc->Mutex.SyncLevel;
WalkState->Thread->CurrentSyncLevel = ObjDesc->Mutex.PreviousSyncLevel;
return_ACPI_STATUS (Status);
}