diff options
Diffstat (limited to 'drivers/i2c/i2c-core-acpi.c')
| -rw-r--r-- | drivers/i2c/i2c-core-acpi.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c index 32affd3fa8bd..689c0c467e97 100644 --- a/drivers/i2c/i2c-core-acpi.c +++ b/drivers/i2c/i2c-core-acpi.c @@ -386,20 +386,22 @@ struct notifier_block i2c_acpi_notifier = { * * Also see i2c_new_device, which this function calls to create the i2c-client. * - * Returns a pointer to the new i2c-client, or NULL if the adapter is not found. + * Returns a pointer to the new i2c-client, or error pointer in case of failure. + * Specifically, -EPROBE_DEFER is returned if the adapter is not found. */ struct i2c_client *i2c_acpi_new_device(struct device *dev, int index, struct i2c_board_info *info) { struct i2c_acpi_lookup lookup; struct i2c_adapter *adapter; + struct i2c_client *client; struct acpi_device *adev; LIST_HEAD(resource_list); int ret; adev = ACPI_COMPANION(dev); if (!adev) - return NULL; + return ERR_PTR(-EINVAL); memset(&lookup, 0, sizeof(lookup)); lookup.info = info; @@ -408,16 +410,23 @@ struct i2c_client *i2c_acpi_new_device(struct device *dev, int index, ret = acpi_dev_get_resources(adev, &resource_list, i2c_acpi_fill_info, &lookup); + if (ret < 0) + return ERR_PTR(ret); + acpi_dev_free_resource_list(&resource_list); - if (ret < 0 || !info->addr) - return NULL; + if (!info->addr) + return ERR_PTR(-EADDRNOTAVAIL); adapter = i2c_acpi_find_adapter_by_handle(lookup.adapter_handle); if (!adapter) - return NULL; + return ERR_PTR(-EPROBE_DEFER); + + client = i2c_new_device(adapter, info); + if (!client) + return ERR_PTR(-ENODEV); - return i2c_new_device(adapter, info); + return client; } EXPORT_SYMBOL_GPL(i2c_acpi_new_device); |