diff options
| -rw-r--r-- | drivers/i2c/i2c-core.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index b696ac7..ccfbbab 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -371,10 +371,15 @@ acpi_i2c_space_handler(u32 function, acpi_physical_address command, static int acpi_i2c_install_space_handler(struct i2c_adapter *adapter) { - acpi_handle handle = ACPI_HANDLE(adapter->dev.parent); + acpi_handle handle; struct acpi_i2c_handler_data *data; acpi_status status; + if (!adapter->dev.parent) + return -ENODEV; + + handle = ACPI_HANDLE(adapter->dev.parent); + if (!handle) return -ENODEV; @@ -407,10 +412,15 @@ static int acpi_i2c_install_space_handler(struct i2c_adapter *adapter) static void acpi_i2c_remove_space_handler(struct i2c_adapter *adapter) { - acpi_handle handle = ACPI_HANDLE(adapter->dev.parent); + acpi_handle handle; struct acpi_i2c_handler_data *data; acpi_status status; + if (!adapter->dev.parent) + return; + + handle = ACPI_HANDLE(adapter->dev.parent); + if (!handle) return; |