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authorBob Moore <robert.moore@intel.com>2006-06-08 16:29:00 -0400
committerLen Brown <len.brown@intel.com>2006-06-14 02:45:47 -0400
commit4c90ece249992c7a2e3fc921e5cdb8eb92193067 (patch)
treee145ffe472802ef870ba1eaea150b688c19e45ca /drivers/acpi/hardware
parent4119532c95547821dbe72d6916dfa1b2148475b3 (diff)
ACPI: ACPICA 20060608
Converted the locking mutex used for the ACPI hardware to a spinlock. This change should eliminate all problems caused by attempting to acquire a semaphore at interrupt level, and it means that all ACPICA external interfaces that directly access the ACPI hardware can be safely called from interrupt level. Fixed a regression introduced in 20060526 where the ACPI device initialization could be prematurely aborted with an AE_NOT_FOUND if a device did not have an optional _INI method. Fixed an IndexField issue where a write to the Data Register should be limited in size to the AccessSize (width) of the IndexField itself. (BZ 433, Fiodor Suietov) Fixed problem reports (Valery Podrezov) integrated: - Allow store of ThermalZone objects to Debug object. http://bugzilla.kernel.org/show_bug.cgi?id=5369 http://bugzilla.kernel.org/show_bug.cgi?id=5370 Fixed problem reports (Fiodor Suietov) integrated: - acpi_get_table_header() doesn't handle multiple instances correctly (BZ 364) Removed four global mutexes that were obsolete and were no longer being used. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/hardware')
-rw-r--r--drivers/acpi/hardware/hwregs.c59
1 files changed, 19 insertions, 40 deletions
diff --git a/drivers/acpi/hardware/hwregs.c b/drivers/acpi/hardware/hwregs.c
index 5a3aa8dd8cb..ae142de1950 100644
--- a/drivers/acpi/hardware/hwregs.c
+++ b/drivers/acpi/hardware/hwregs.c
@@ -61,10 +61,13 @@ ACPI_MODULE_NAME("hwregs")
* DESCRIPTION: Clears all fixed and general purpose status bits
* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
*
+ * NOTE: TBD: Flags parameter is obsolete, to be removed
+ *
******************************************************************************/
acpi_status acpi_hw_clear_acpi_status(u32 flags)
{
acpi_status status;
+ acpi_cpu_flags lock_flags = 0;
ACPI_FUNCTION_TRACE(hw_clear_acpi_status);
@@ -72,12 +75,7 @@ acpi_status acpi_hw_clear_acpi_status(u32 flags)
ACPI_BITMASK_ALL_FIXED_STATUS,
(u16) acpi_gbl_FADT->xpm1a_evt_blk.address));
- if (flags & ACPI_MTX_LOCK) {
- status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
- }
+ lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
ACPI_REGISTER_PM1_STATUS,
@@ -102,9 +100,7 @@ acpi_status acpi_hw_clear_acpi_status(u32 flags)
status = acpi_ev_walk_gpe_list(acpi_hw_clear_gpe_block);
unlock_and_exit:
- if (flags & ACPI_MTX_LOCK) {
- (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE);
- }
+ acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags);
return_ACPI_STATUS(status);
}
@@ -264,6 +260,8 @@ struct acpi_bit_register_info *acpi_hw_get_bit_register_info(u32 register_id)
*
* DESCRIPTION: ACPI bit_register read function.
*
+ * NOTE: TBD: Flags parameter is obsolete, to be removed
+ *
******************************************************************************/
acpi_status acpi_get_register(u32 register_id, u32 * return_value, u32 flags)
@@ -281,23 +279,12 @@ acpi_status acpi_get_register(u32 register_id, u32 * return_value, u32 flags)
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
- if (flags & ACPI_MTX_LOCK) {
- status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
- }
-
/* Read from the register */
- status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK,
+ status = acpi_hw_register_read(ACPI_MTX_LOCK,
bit_reg_info->parent_register,
&register_value);
- if (flags & ACPI_MTX_LOCK) {
- (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE);
- }
-
if (ACPI_SUCCESS(status)) {
/* Normalize the value that was read */
@@ -331,12 +318,15 @@ ACPI_EXPORT_SYMBOL(acpi_get_register)
*
* DESCRIPTION: ACPI Bit Register write function.
*
+ * NOTE: TBD: Flags parameter is obsolete, to be removed
+ *
******************************************************************************/
acpi_status acpi_set_register(u32 register_id, u32 value, u32 flags)
{
u32 register_value = 0;
struct acpi_bit_register_info *bit_reg_info;
acpi_status status;
+ acpi_cpu_flags lock_flags;
ACPI_FUNCTION_TRACE_U32(acpi_set_register, register_id);
@@ -349,12 +339,7 @@ acpi_status acpi_set_register(u32 register_id, u32 value, u32 flags)
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
- if (flags & ACPI_MTX_LOCK) {
- status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
- }
+ lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
/* Always do a register read first so we can insert the new bits */
@@ -462,9 +447,7 @@ acpi_status acpi_set_register(u32 register_id, u32 value, u32 flags)
unlock_and_exit:
- if (flags & ACPI_MTX_LOCK) {
- (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE);
- }
+ acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags);
/* Normalize the value that was read */
@@ -500,14 +483,12 @@ acpi_hw_register_read(u8 use_lock, u32 register_id, u32 * return_value)
u32 value1 = 0;
u32 value2 = 0;
acpi_status status;
+ acpi_cpu_flags lock_flags = 0;
ACPI_FUNCTION_TRACE(hw_register_read);
if (ACPI_MTX_LOCK == use_lock) {
- status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
+ lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
}
switch (register_id) {
@@ -585,7 +566,7 @@ acpi_hw_register_read(u8 use_lock, u32 register_id, u32 * return_value)
unlock_and_exit:
if (ACPI_MTX_LOCK == use_lock) {
- (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE);
+ acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags);
}
if (ACPI_SUCCESS(status)) {
@@ -613,14 +594,12 @@ acpi_hw_register_read(u8 use_lock, u32 register_id, u32 * return_value)
acpi_status acpi_hw_register_write(u8 use_lock, u32 register_id, u32 value)
{
acpi_status status;
+ acpi_cpu_flags lock_flags = 0;
ACPI_FUNCTION_TRACE(hw_register_write);
if (ACPI_MTX_LOCK == use_lock) {
- status = acpi_ut_acquire_mutex(ACPI_MTX_HARDWARE);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
+ lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
}
switch (register_id) {
@@ -710,7 +689,7 @@ acpi_status acpi_hw_register_write(u8 use_lock, u32 register_id, u32 value)
unlock_and_exit:
if (ACPI_MTX_LOCK == use_lock) {
- (void)acpi_ut_release_mutex(ACPI_MTX_HARDWARE);
+ acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags);
}
return_ACPI_STATUS(status);