On Tuesday, September 26, 2017 11:08:27 AM CEST Sakari Ailus wrote:
> acpi_fwnode_get_reference_args(), the function implementing ACPI
> support for fwnode_property_get_reference_args(), returns directly
> error codes from __acpi_node_get_property_reference(). The latter uses
> different error codes than the OF implementation. In particular, the OF
> implementation uses -ENOENT to indicate that the property is not found, a
> reference entry is empty and there are no more references.
>
> Document and align the error codes for property for
> fwnode_property_get_reference_args() so that they match with
> of_parse_phandle_with_args().
>
> Fixes: 3e3119d3088f ("device property: Introduce fwnode_property_get_reference_args")
> Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Applied, thanks!
> ---
> The patch was called "device property: Align return codes of
> acpi_fwnode_get_reference_with_args", and is an alternative to the set
> "[RFC 0/5] Align and document return values of phandle and reference
> parsing for OF and ACPI".
>
> since v2:
>
> - Change the functionality of __acpi_node_get_property_reference rather
> than that of acpi_fwnode_get_reference_args.
>
> drivers/acpi/property.c | 19 +++++++++----------
> drivers/base/property.c | 4 ++++
> 2 files changed, 13 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
> index 3fb8ff513461..5a8ac5e1081b 100644
> --- a/drivers/acpi/property.c
> +++ b/drivers/acpi/property.c
> @@ -571,10 +571,9 @@ static int acpi_data_get_property_array(const struct acpi_device_data *data,
> * }
> * }
> *
> - * Calling this function with index %2 return %-ENOENT and with index %3
> - * returns the last entry. If the property does not contain any more values
> - * %-ENODATA is returned. The NULL entry must be single integer and
> - * preferably contain value %0.
> + * Calling this function with index %2 or index %3 return %-ENOENT. If the
> + * property does not contain any more values %-ENOENT is returned. The NULL
> + * entry must be single integer and preferably contain value %0.
> *
> * Return: %0 on success, negative error code on failure.
> */
> @@ -590,7 +589,7 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
>
> data = acpi_device_data_of_node(fwnode);
> if (!data)
> - return -EINVAL;
> + return -ENOENT;
>
> ret = acpi_data_get_property(data, propname, ACPI_TYPE_ANY, &obj);
> if (ret)
> @@ -635,7 +634,7 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
> ret = acpi_bus_get_device(element->reference.handle,
> &device);
> if (ret)
> - return -ENODEV;
> + return -EINVAL;
>
> nargs = 0;
> element++;
> @@ -649,11 +648,11 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
> else if (type == ACPI_TYPE_LOCAL_REFERENCE)
> break;
> else
> - return -EPROTO;
> + return -EINVAL;
> }
>
> if (nargs > MAX_ACPI_REFERENCE_ARGS)
> - return -EPROTO;
> + return -EINVAL;
>
> if (idx == index) {
> args->adev = device;
> @@ -670,13 +669,13 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
> return -ENOENT;
> element++;
> } else {
> - return -EPROTO;
> + return -EINVAL;
> }
>
> idx++;
> }
>
> - return -ENODATA;
> + return -ENOENT;
> }
> EXPORT_SYMBOL_GPL(__acpi_node_get_property_reference);
>
> diff --git a/drivers/base/property.c b/drivers/base/property.c
> index 0c8958747c8b..a9ee5efe22d9 100644
> --- a/drivers/base/property.c
> +++ b/drivers/base/property.c
> @@ -682,6 +682,10 @@ EXPORT_SYMBOL_GPL(fwnode_property_match_string);
> * Caller is responsible to call fwnode_handle_put() on the returned
> * args->fwnode pointer.
> *
> + * Returns: %0 on success
> + * %-ENOENT when the index is out of bounds, the index has an empty
> + * reference or the property was not found
> + * %-EINVAL on parse error
> */
> int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode,
> const char *prop, const char *nargs_prop,
>
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