6.10-stable review patch. If anyone has any objections, please let me know.
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From: Rafael J. Wysocki rafael.j.wysocki@intel.com
commit 71bf41b8e913ec9fc91f0d39ab8fb320229ec604 upstream.
Commit 60fa6ae6e6d0 ("ACPI: EC: Install address space handler at the namespace root") caused _REG methods for EC operation regions outside the EC device scope to be evaluated which on some systems leads to the evaluation of _REG methods in the scopes of device objects representing devices that are not present and not functional according to the _STA return values. Some of those device objects represent EC "alternatives" and if _REG is evaluated for their operation regions, the platform firmware may be confused and the platform may start to behave incorrectly.
To avoid this problem, only evaluate _REG for EC operation regions located in the scopes of device objects representing known-to-be-present devices.
For this purpose, partially revert commit 60fa6ae6e6d0 and trigger the evaluation of _REG for EC operation regions from acpi_bus_attach() for the known-valid devices.
Fixes: 60fa6ae6e6d0 ("ACPI: EC: Install address space handler at the namespace root") Link: https://lore.kernel.org/linux-acpi/1f76b7e2-1928-4598-8037-28a1785c2d13@redh... Link: https://bugzilla.redhat.com/show_bug.cgi?id=2298938 Link: https://bugzilla.redhat.com/show_bug.cgi?id=2302253 Reported-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Reviewed-by: Hans de Goede hdegoede@redhat.com Cc: All applicable stable@vger.kernel.org Link: https://patch.msgid.link/23612351.6Emhk5qWAg@rjwysocki.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/acpi/ec.c | 11 +++++++++-- drivers/acpi/internal.h | 1 + drivers/acpi/scan.c | 2 ++ 3 files changed, 12 insertions(+), 2 deletions(-)
--- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -1487,12 +1487,13 @@ static bool install_gpio_irq_event_handl static int ec_install_handlers(struct acpi_ec *ec, struct acpi_device *device, bool call_reg) { - acpi_handle scope_handle = ec == first_ec ? ACPI_ROOT_OBJECT : ec->handle; acpi_status status;
acpi_ec_start(ec, false);
if (!test_bit(EC_FLAGS_EC_HANDLER_INSTALLED, &ec->flags)) { + acpi_handle scope_handle = ec == first_ec ? ACPI_ROOT_OBJECT : ec->handle; + acpi_ec_enter_noirq(ec); status = acpi_install_address_space_handler_no_reg(scope_handle, ACPI_ADR_SPACE_EC, @@ -1506,7 +1507,7 @@ static int ec_install_handlers(struct ac }
if (call_reg && !test_bit(EC_FLAGS_EC_REG_CALLED, &ec->flags)) { - acpi_execute_reg_methods(scope_handle, ACPI_UINT32_MAX, ACPI_ADR_SPACE_EC); + acpi_execute_reg_methods(ec->handle, ACPI_UINT32_MAX, ACPI_ADR_SPACE_EC); set_bit(EC_FLAGS_EC_REG_CALLED, &ec->flags); }
@@ -1721,6 +1722,12 @@ static void acpi_ec_remove(struct acpi_d } }
+void acpi_ec_register_opregions(struct acpi_device *adev) +{ + if (first_ec && first_ec->handle != adev->handle) + acpi_execute_reg_methods(adev->handle, 1, ACPI_ADR_SPACE_EC); +} + static acpi_status ec_parse_io_ports(struct acpi_resource *resource, void *context) { --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -223,6 +223,7 @@ int acpi_ec_add_query_handler(struct acp acpi_handle handle, acpi_ec_query_func func, void *data); void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit); +void acpi_ec_register_opregions(struct acpi_device *adev);
#ifdef CONFIG_PM_SLEEP void acpi_ec_flush_work(void); --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -2264,6 +2264,8 @@ static int acpi_bus_attach(struct acpi_d if (device->handler) goto ok;
+ acpi_ec_register_opregions(device); + if (!device->flags.initialized) { device->flags.power_manageable = device->power.states[ACPI_STATE_D0].flags.valid;