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Merge tag 'acpi-6.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

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Pull more ACPI updates from Rafael Wysocki:
 "These fix an AML byte code execution issue in ACPICA and two issues in
  the ACPI EC driver which requires rearranging ACPICA code.

  Specifics:

   - Avoid trying to resolve operands in AML when there are none
     (Amadeusz Sławiński)

   - Fix indentation in include/acpi/acpixf.h to help applying patches
     from the upstream ACPICA git (Hans de Goede)

   - Make it possible to install an address space handler without
     evaluating _REG for Operation Regions in the given address space
     (Hans de Goede)

   - Defer the evaluation of _REG for ECDT described ECs till the
     matching EC device in the DSDT gets parsed and acpi_ec_add() gets
     called for it (Hans de Goede)

   - Fix EC address space handler unregistration (Hans de Goede)"

* tag 'acpi-6.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: EC: Fix ECDT probe ordering issues
  ACPI: EC: Fix EC address space handler unregistration
  ACPICA: Allow address_space_handler Install and _REG execution as 2 separate steps
  ACPICA: include/acpi/acpixf.h: Fix indentation
  ACPICA: Fix operand resolution
This commit is contained in:
Linus Torvalds
2022-12-15 10:21:10 -08:00
parent 601c1aa855 3d03140c48
commit 057b40f43c
5 changed files with 185 additions and 84 deletions
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6
drivers/acpi/acpica/dswexec.c
View File

@@ -389,9 +389,11 @@ acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
/*
* All opcodes require operand resolution, with the only exceptions
* being the object_type and size_of operators.
* being the object_type and size_of operators as well as opcodes that
* take no arguments.
*/
if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) {
if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE) &&
(walk_state->op_info->flags & AML_HAS_ARGS)) {
/* Resolve all operands */

86
drivers/acpi/acpica/evxfregn.c
View File

@@ -20,13 +20,14 @@ ACPI_MODULE_NAME("evxfregn")
/*******************************************************************************
*
* FUNCTION: acpi_install_address_space_handler
* FUNCTION: acpi_install_address_space_handler_internal
*
* PARAMETERS: device - Handle for the device
* space_id - The address space ID
* handler - Address of the handler
* setup - Address of the setup function
* context - Value passed to the handler on each access
* Run_reg - Run _REG methods for this address space?
*
* RETURN: Status
*
@@ -37,13 +38,16 @@ ACPI_MODULE_NAME("evxfregn")
* are executed here, and these methods can only be safely executed after
* the default handlers have been installed and the hardware has been
* initialized (via acpi_enable_subsystem.)
* To avoid this problem pass FALSE for Run_Reg and later on call
* acpi_execute_reg_methods() to execute _REG.
*
******************************************************************************/
acpi_status
acpi_install_address_space_handler(acpi_handle device,
static acpi_status
acpi_install_address_space_handler_internal(acpi_handle device,
acpi_adr_space_type space_id,
acpi_adr_space_handler handler,
acpi_adr_space_setup setup, void *context)
acpi_adr_space_setup setup,
void *context, u8 run_reg)
{
struct acpi_namespace_node *node;
acpi_status status;
@@ -80,14 +84,40 @@ acpi_install_address_space_handler(acpi_handle device,
/* Run all _REG methods for this address space */
if (run_reg) {
acpi_ev_execute_reg_methods(node, space_id, ACPI_REG_CONNECT);
}
unlock_and_exit:
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
return_ACPI_STATUS(status);
}
acpi_status
acpi_install_address_space_handler(acpi_handle device,
acpi_adr_space_type space_id,
acpi_adr_space_handler handler,
acpi_adr_space_setup setup, void *context)
{
return acpi_install_address_space_handler_internal(device, space_id,
handler, setup,
context, TRUE);
}
ACPI_EXPORT_SYMBOL(acpi_install_address_space_handler)
acpi_status
acpi_install_address_space_handler_no_reg(acpi_handle device,
acpi_adr_space_type space_id,
acpi_adr_space_handler handler,
acpi_adr_space_setup setup,
void *context)
{
return acpi_install_address_space_handler_internal(device, space_id,
handler, setup,
context, FALSE);
}
ACPI_EXPORT_SYMBOL(acpi_install_address_space_handler_no_reg)
/*******************************************************************************
*
@@ -228,3 +258,51 @@ unlock_and_exit:
}
ACPI_EXPORT_SYMBOL(acpi_remove_address_space_handler)
/*******************************************************************************
*
* FUNCTION: acpi_execute_reg_methods
*
* PARAMETERS: device - Handle for the device
* space_id - The address space ID
*
* RETURN: Status
*
* DESCRIPTION: Execute _REG for all op_regions of a given space_id.
*
******************************************************************************/
acpi_status
acpi_execute_reg_methods(acpi_handle device, acpi_adr_space_type space_id)
{
struct acpi_namespace_node *node;
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_execute_reg_methods);
/* Parameter validation */
if (!device) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Convert and validate the device handle */
node = acpi_ns_validate_handle(device);
if (node) {
/* Run all _REG methods for this address space */
acpi_ev_execute_reg_methods(node, space_id, ACPI_REG_CONNECT);
} else {
status = AE_BAD_PARAMETER;
}
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_execute_reg_methods)

26
drivers/acpi/ec.c
View File

@@ -94,6 +94,7 @@ enum {
EC_FLAGS_QUERY_ENABLED, /* Query is enabled */
EC_FLAGS_EVENT_HANDLER_INSTALLED, /* Event handler installed */
EC_FLAGS_EC_HANDLER_INSTALLED, /* OpReg handler installed */
EC_FLAGS_EC_REG_CALLED, /* OpReg ACPI _REG method called */
EC_FLAGS_QUERY_METHODS_INSTALLED, /* _Qxx handlers installed */
EC_FLAGS_STARTED, /* Driver is started */
EC_FLAGS_STOPPED, /* Driver is stopped */
@@ -1446,6 +1447,7 @@ static bool install_gpio_irq_event_handler(struct acpi_ec *ec)
* ec_install_handlers - Install service callbacks and register query methods.
* @ec: Target EC.
* @device: ACPI device object corresponding to @ec.
* @call_reg: If _REG should be called to notify OpRegion availability
*
* Install a handler for the EC address space type unless it has been installed
* already. If @device is not NULL, also look for EC query methods in the
@@ -1458,7 +1460,8 @@ static bool install_gpio_irq_event_handler(struct acpi_ec *ec)
* -EPROBE_DEFER if GPIO IRQ acquisition needs to be deferred,
* or 0 (success) otherwise.
*/
static int ec_install_handlers(struct acpi_ec *ec, struct acpi_device *device)
static int ec_install_handlers(struct acpi_ec *ec, struct acpi_device *device,
bool call_reg)
{
acpi_status status;
@@ -1466,7 +1469,7 @@ static int ec_install_handlers(struct acpi_ec *ec, struct acpi_device *device)
if (!test_bit(EC_FLAGS_EC_HANDLER_INSTALLED, &ec->flags)) {
acpi_ec_enter_noirq(ec);
status = acpi_install_address_space_handler(ec->handle,
status = acpi_install_address_space_handler_no_reg(ec->handle,
ACPI_ADR_SPACE_EC,
&acpi_ec_space_handler,
NULL, ec);
@@ -1475,6 +1478,12 @@ static int ec_install_handlers(struct acpi_ec *ec, struct acpi_device *device)
return -ENODEV;
}
set_bit(EC_FLAGS_EC_HANDLER_INSTALLED, &ec->flags);
ec->address_space_handler_holder = ec->handle;
}
if (call_reg && !test_bit(EC_FLAGS_EC_REG_CALLED, &ec->flags)) {
acpi_execute_reg_methods(ec->handle, ACPI_ADR_SPACE_EC);
set_bit(EC_FLAGS_EC_REG_CALLED, &ec->flags);
}
if (!device)
@@ -1526,7 +1535,8 @@ static int ec_install_handlers(struct acpi_ec *ec, struct acpi_device *device)
static void ec_remove_handlers(struct acpi_ec *ec)
{
if (test_bit(EC_FLAGS_EC_HANDLER_INSTALLED, &ec->flags)) {
if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle,
if (ACPI_FAILURE(acpi_remove_address_space_handler(
ec->address_space_handler_holder,
ACPI_ADR_SPACE_EC, &acpi_ec_space_handler)))
pr_err("failed to remove space handler\n");
clear_bit(EC_FLAGS_EC_HANDLER_INSTALLED, &ec->flags);
@@ -1562,11 +1572,11 @@ static void ec_remove_handlers(struct acpi_ec *ec)
}
}
static int acpi_ec_setup(struct acpi_ec *ec, struct acpi_device *device)
static int acpi_ec_setup(struct acpi_ec *ec, struct acpi_device *device, bool call_reg)
{
int ret;
ret = ec_install_handlers(ec, device);
ret = ec_install_handlers(ec, device, call_reg);
if (ret)
return ret;
@@ -1631,7 +1641,7 @@ static int acpi_ec_add(struct acpi_device *device)
}
}
ret = acpi_ec_setup(ec, device);
ret = acpi_ec_setup(ec, device, true);
if (ret)
goto err;
@@ -1750,7 +1760,7 @@ void __init acpi_ec_dsdt_probe(void)
* At this point, the GPE is not fully initialized, so do not to
* handle the events.
*/
ret = acpi_ec_setup(ec, NULL);
ret = acpi_ec_setup(ec, NULL, true);
if (ret) {
acpi_ec_free(ec);
return;
@@ -1944,7 +1954,7 @@ void __init acpi_ec_ecdt_probe(void)
* At this point, the namespace is not initialized, so do not find
* the namespace objects, or handle the events.
*/
ret = acpi_ec_setup(ec, NULL);
ret = acpi_ec_setup(ec, NULL, false);
if (ret) {
acpi_ec_free(ec);
goto out;

1
drivers/acpi/internal.h
View File

@@ -173,6 +173,7 @@ enum acpi_ec_event_state {
struct acpi_ec {
acpi_handle handle;
acpi_handle address_space_handler_holder;
int gpe;
int irq;
unsigned long command_addr;

10
include/acpi/acpixf.h
View File

@@ -652,6 +652,16 @@ ACPI_EXTERNAL_RETURN_STATUS(acpi_status
acpi_adr_space_setup
setup,
void *context))
ACPI_EXTERNAL_RETURN_STATUS(acpi_status
acpi_install_address_space_handler_no_reg
(acpi_handle device, acpi_adr_space_type space_id,
acpi_adr_space_handler handler,
acpi_adr_space_setup setup,
void *context))
ACPI_EXTERNAL_RETURN_STATUS(acpi_status
acpi_execute_reg_methods(acpi_handle device,
acpi_adr_space_type
space_id))
ACPI_EXTERNAL_RETURN_STATUS(acpi_status
acpi_remove_address_space_handler(acpi_handle
device,