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Remove code to disable bus master arbitration.

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This change removes the code to disable/enable bus master
arbitration during suspend/resume. Use of the ARB_DIS
bit in the optional PM2_CNT register causes resume problems
on many machines.
This commit is contained in:
Robert Moore 2012-07-09 12:12:02 -07:00
parent 2e674261e8
commit fe1a5ac7d8
1 changed files with 13 additions and 21 deletions
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34
source/components/hardware/hwsleep.c
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@ -171,19 +171,14 @@ AcpiHwLegacySleep (
return_ACPI_STATUS (Status);
}
if (SleepState != ACPI_STATE_S5)
{
/*
* Disable BM arbitration. This feature is contained within an
* optional register (PM2 Control), so ignore a BAD_ADDRESS
* exception.
*/
Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 1);
if (ACPI_FAILURE (Status) && (Status != AE_BAD_ADDRESS))
{
return_ACPI_STATUS (Status);
}
}
/*
* Code removed: no longer set the ARB_DIS bit in the PM2_CNT
* register when suspending. Use of ARB_DIS causes resume
* problems on many machines.
*
* if (SleepState != ACPI_STATE_S5)
* Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 1);
*/
/*
* 1) Disable/Clear all GPEs
@ -453,15 +448,12 @@ AcpiHwLegacyWake (
ACPI_CLEAR_STATUS);
/*
* Enable BM arbitration. This feature is contained within an
* optional register (PM2 Control), so ignore a BAD_ADDRESS
* exception.
* Code removed: no longer clear the ARB_DIS bit in the PM2_CNT
* register when resuming. Use of ARB_DIS causes resume problems
* on many machines.
*
* Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 0);
*/
Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 0);
if (ACPI_FAILURE (Status) && (Status != AE_BAD_ADDRESS))
{
return_ACPI_STATUS (Status);
}
AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, ACPI_SST_WORKING);
return_ACPI_STATUS (Status);