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ACPICA: Remove extra write for acpi_hw_clear_acpi_status 

This function was writing an optional PM1B status register
twice.  The existing call to the low-level acpi_hw_register_write
automatically handles a possibly split PM1 A/B register.
ACPICA BZ 751.

http://www.acpica.org/bugzilla/show_bug.cgi?id=751

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bob Moore 2009-02-18 14:24:50 +08:00 committed by Len Brown
parent c520abadbc
commit 227243a04d
1 changed files with 3 additions and 14 deletions
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17
drivers/acpi/acpica/hwregs.c
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@ -71,7 +71,6 @@ acpi_hw_write_multiple(u32 value,
* RETURN: Status
*
* DESCRIPTION: Clears all fixed and general purpose status bits
* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
*
******************************************************************************/
@ -82,13 +81,13 @@ acpi_status acpi_hw_clear_acpi_status(void)
ACPI_FUNCTION_TRACE(hw_clear_acpi_status);
ACPI_DEBUG_PRINT((ACPI_DB_IO, "About to write %04X to %04X\n",
ACPI_DEBUG_PRINT((ACPI_DB_IO, "About to write %04X to %0llX\n",
ACPI_BITMASK_ALL_FIXED_STATUS,
(u16) acpi_gbl_xpm1a_status.address));
acpi_gbl_xpm1a_status.address));
lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
/* Clear the fixed events */
/* Clear the fixed events in PM1 A/B */
status = acpi_hw_register_write(ACPI_REGISTER_PM1_STATUS,
ACPI_BITMASK_ALL_FIXED_STATUS);
@ -96,16 +95,6 @@ acpi_status acpi_hw_clear_acpi_status(void)
goto unlock_and_exit;
}
/* Write PM1B register if present */
if (acpi_gbl_xpm1b_status.address) {
status = acpi_write(ACPI_BITMASK_ALL_FIXED_STATUS,
&acpi_gbl_xpm1b_status);
if (ACPI_FAILURE(status)) {
goto unlock_and_exit;
}
}
/* Clear the GPE Bits in all GPE registers in all GPE blocks */
status = acpi_ev_walk_gpe_list(acpi_hw_clear_gpe_block, NULL);