[v1,1/1] device property: Fix documentation for *_match_string() APIs

The returned value on success is an index of the matching string,
starting from 0. Reflect this in the documentation.

Fixes: 3f5c8d318785 ("device property: Add fwnode_property_match_string()")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/base/property.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Hi Andy,

On Thu, Oct 06, 2022 at 03:38:07PM +0300, Andy Shevchenko wrote:
> The returned value on success is an index of the matching string,
> starting from 0. Reflect this in the documentation.
> 
> Fixes: 3f5c8d318785 ("device property: Add fwnode_property_match_string()")
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> ---
>  drivers/base/property.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/base/property.c b/drivers/base/property.c
> index 617007a25783..bfed224c5724 100644
> --- a/drivers/base/property.c
> +++ b/drivers/base/property.c
> @@ -236,7 +236,7 @@ EXPORT_SYMBOL_GPL(device_property_read_string);
>   * Find a given string in a string array and if it is found return the
>   * index back.
>   *
> - * Return: %0 if the property was found (success),
> + * Return: index, starting from %0, if the property was found (success),
>   *	   %-EINVAL if given arguments are not valid,
>   *	   %-ENODATA if the property does not have a value,
>   *	   %-EPROTO if the property is not an array of strings,

There are other error codes that can be returned such as -ENOMEM or what
else may be returned by fwnode_property_read_string_array().

I might just refer to fwnode_property_read_string_array() and document here
those specific to these functions.

Just FYI... I guess this could be a separate patch, too.

Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>

> @@ -457,7 +457,7 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_string);
>   * Find a given string in a string array and if it is found return the
>   * index back.
>   *
> - * Return: %0 if the property was found (success),
> + * Return: index, starting from %0, if the property was found (success),
>   *	   %-EINVAL if given arguments are not valid,
>   *	   %-ENODATA if the property does not have a value,
>   *	   %-EPROTO if the property is not an array of strings,

On Thu, Oct 06, 2022 at 03:55:05PM +0300, Andy Shevchenko wrote:
> On Thu, Oct 06, 2022 at 12:45:41PM +0000, Sakari Ailus wrote:
> > On Thu, Oct 06, 2022 at 03:38:07PM +0300, Andy Shevchenko wrote:
> > > The returned value on success is an index of the matching string,
> > > starting from 0. Reflect this in the documentation.
> 
> > > Fixes: 3f5c8d318785 ("device property: Add fwnode_property_match_string()")
> 
> ...
> 
> > > - * Return: %0 if the property was found (success),
> > > + * Return: index, starting from %0, if the property was found (success),
> > >   *	   %-EINVAL if given arguments are not valid,
> > >   *	   %-ENODATA if the property does not have a value,
> > >   *	   %-EPROTO if the property is not an array of strings,
> > 
> > There are other error codes that can be returned such as -ENOMEM or what
> > else may be returned by fwnode_property_read_string_array().
> > 
> > I might just refer to fwnode_property_read_string_array() and document here
> > those specific to these functions.
> > 
> > Just FYI... I guess this could be a separate patch, too.
> 
> Right, I think we would rather do an incremental change since that will be
> more intrusive and would not be exactly the fix (improvement?).

It's a fix in documentation. It's perhaps unlikely a bug would have been
introduced because of what was missing.

> 
> > Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> 
> Thanks!

You're welcome!

On Thu, Oct 06, 2022 at 03:38:07PM +0300, Andy Shevchenko wrote:
> The returned value on success is an index of the matching string,
> starting from 0. Reflect this in the documentation.
> 
> Fixes: 3f5c8d318785 ("device property: Add fwnode_property_match_string()")
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Is this gone through the cracks?

On Tue, Oct 25, 2022 at 11:06 AM Andy Shevchenko
<andriy.shevchenko@linux.intel.com> wrote:
>
> On Thu, Oct 06, 2022 at 03:38:07PM +0300, Andy Shevchenko wrote:
> > The returned value on success is an index of the matching string,
> > starting from 0. Reflect this in the documentation.
> >
> > Fixes: 3f5c8d318785 ("device property: Add fwnode_property_match_string()")
> > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
>
> Is this gone through the cracks?

No, it is not.  I've just applied it for 6.1-rc3.

Thanks!

On Tue, Oct 25, 2022 at 08:20:24PM +0200, Rafael J. Wysocki wrote:
> On Tue, Oct 25, 2022 at 11:06 AM Andy Shevchenko
> <andriy.shevchenko@linux.intel.com> wrote:
> > On Thu, Oct 06, 2022 at 03:38:07PM +0300, Andy Shevchenko wrote:
> > > The returned value on success is an index of the matching string,
> > > starting from 0. Reflect this in the documentation.
> > >
> > > Fixes: 3f5c8d318785 ("device property: Add fwnode_property_match_string()")
> > > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> >
> > Is this gone through the cracks?
> 
> No, it is not.  I've just applied it for 6.1-rc3.

Thank you, Rafael!