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Power management fix for 3.5-rc7

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This removes ACPICA code that had been removed once from the kernel
 already by commit 2780cc4660e1 ([ACPI] Fix suspend/resume lockup
 issue by leaving Bus Master Arbitration enabled.), because it was
 known to cause systems to lock up during resume from suspend, but was
 re-introduced by mistake during the v3.4 merge window.
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Merge tag 'pm-for-3.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fix from Rafael Wysocki:
 "This removes ACPICA code that had already been removed once from the
  kernel already by commit 2780cc4660e1 ("[ACPI] Fix suspend/resume
  lockup issue by leaving Bus Master Arbitration enabled"), because it
  was known to cause systems to lock up during resume from suspend, but
  was re-introduced by mistake during the v3.4 merge window."

* tag 'pm-for-3.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / PM: Leave Bus Master Arbitration enabled for suspend/resume
This commit is contained in:
Linus Torvalds 2012-07-11 12:42:39 -07:00
commit 8daf4ded90
1 changed files with 0 additions and 22 deletions
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22
drivers/acpi/acpica/hwsleep.c
View File

@ -95,18 +95,6 @@ acpi_status acpi_hw_legacy_sleep(u8 sleep_state, u8 flags)
return_ACPI_STATUS(status);
}
if (sleep_state != ACPI_STATE_S5) {
/*
* Disable BM arbitration. This feature is contained within an
* optional register (PM2 Control), so ignore a BAD_ADDRESS
* exception.
*/
status = acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 1);
if (ACPI_FAILURE(status) && (status != AE_BAD_ADDRESS)) {
return_ACPI_STATUS(status);
}
}
/*
* 1) Disable/Clear all GPEs
* 2) Enable all wakeup GPEs
@ -364,16 +352,6 @@ acpi_status acpi_hw_legacy_wake(u8 sleep_state, u8 flags)
[ACPI_EVENT_POWER_BUTTON].
status_register_id, ACPI_CLEAR_STATUS);
/*
* Enable BM arbitration. This feature is contained within an
* optional register (PM2 Control), so ignore a BAD_ADDRESS
* exception.
*/
status = acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 0);
if (ACPI_FAILURE(status) && (status != AE_BAD_ADDRESS)) {
return_ACPI_STATUS(status);
}
acpi_hw_execute_sleep_method(METHOD_PATHNAME__SST, ACPI_SST_WORKING);
return_ACPI_STATUS(status);
}