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[3/4] ACPI: EC: Fix EC address space handler unregistration

Message ID 20221208142335.488382-4-hdegoede@redhat.com
State Accepted
Commit a5072078dbfaa9d70130805766dfa34bbb7bf2a7
Headers show
Series ACPI[CA]: fix ECDT EC probe ordering issues | expand

Commit Message

Hans de Goede Dec. 8, 2022, 2:23 p.m. UTC 
When an ECDT table is present the EC address space handler gets registered
on the root node. So to unregister it properly the unregister call also
must be done on the root node.

Store the ACPI handle used for the acpi_install_address_space_handler()
call and use te same handle for the acpi_remove_address_space_handler()
call.

Reported-by: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/acpi/ec.c       | 4 +++-
 drivers/acpi/internal.h | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 2520fb998ce6..2de00fe218f9 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -1475,6 +1475,7 @@  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 (!device)
@@ -1526,7 +1527,8 @@  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);
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;