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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2022-12-15 20:38:22 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2022-12-15 20:38:22 +0300
commit3d03140c4844bbd128728e8a367bb467d95f888e (patch)
treec965c58d1a872340b29e574e9bc993c796f0f75f /drivers
parentf7eae09b50431e36fd61c8cb6fb184bf0e068905 (diff)
parentab4620f58d38206687b9f99d9d2cc1d5a2640985 (diff)
downloadlinux-3d03140c4844bbd128728e8a367bb467d95f888e.tar.xz
Merge branch 'acpi-ec'
Merge additional ACPI EC driver fixes for 6.2-rc1: - Fix EC address space handler unregistration (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). * acpi-ec: ACPI: EC: Fix ECDT probe ordering issues ACPI: EC: Fix EC address space handler unregistration
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/ec.c32
-rw-r--r--drivers/acpi/internal.h1
2 files changed, 22 insertions, 11 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 2520fb998ce6..105d2e795afa 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -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;
@@ -1466,15 +1469,21 @@ 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,
- ACPI_ADR_SPACE_EC,
- &acpi_ec_space_handler,
- NULL, ec);
+ status = acpi_install_address_space_handler_no_reg(ec->handle,
+ ACPI_ADR_SPACE_EC,
+ &acpi_ec_space_handler,
+ NULL, ec);
if (ACPI_FAILURE(status)) {
acpi_ec_stop(ec, false);
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;
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 219c02df9a08..ec584442fb29 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -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;