Re: [PATCH v6 1/2] iio: adc: mcp3564: Use device_for_each_child_node_scoped()

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On Sun, 28 Apr 2024 17:25:57 -0300
Marcelo Schmitt <marcelo.schmitt1@xxxxxxxxx> wrote:

> Hi Jonathan,
> 
> This also looks good to me.
> 
> Reviewed-by: Marcelo Schmitt <marcelo.schmitt1@xxxxxxxxx>
Thanks,

Applied.

1 to go. Someone must want to give the ads1015 patch the love
it needs? :)

Jonathan

> 
> On 04/28, Jonathan Cameron wrote:
> > From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
> > 
> > Switching to the _scoped() version removes the need for manual
> > calling of fwnode_handle_put() in the paths where the code
> > exits the loop early. In this case that's all in error paths.
> > 
> > Cc: Marius Cristea <marius.cristea@xxxxxxxxxxxxx>
> > Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
> > ---
> >  drivers/iio/adc/mcp3564.c | 16 +++++++---------
> >  1 file changed, 7 insertions(+), 9 deletions(-)
> > 
> > diff --git a/drivers/iio/adc/mcp3564.c b/drivers/iio/adc/mcp3564.c
> > index 311b613b6057..e2ae13f1e842 100644
> > --- a/drivers/iio/adc/mcp3564.c
> > +++ b/drivers/iio/adc/mcp3564.c
> > @@ -998,7 +998,6 @@ static int mcp3564_parse_fw_children(struct iio_dev *indio_dev)
> >  	struct mcp3564_state *adc = iio_priv(indio_dev);
> >  	struct device *dev = &adc->spi->dev;
> >  	struct iio_chan_spec *channels;
> > -	struct fwnode_handle *child;
> >  	struct iio_chan_spec chanspec = mcp3564_channel_template;
> >  	struct iio_chan_spec temp_chanspec = mcp3564_temp_channel_template;
> >  	struct iio_chan_spec burnout_chanspec = mcp3564_burnout_channel_template;
> > @@ -1025,7 +1024,7 @@ static int mcp3564_parse_fw_children(struct iio_dev *indio_dev)
> >  	if (!channels)
> >  		return dev_err_probe(dev, -ENOMEM, "Can't allocate memory\n");
> >  
> > -	device_for_each_child_node(dev, child) {
> > +	device_for_each_child_node_scoped(dev, child) {
> >  		node_name = fwnode_get_name(child);
> >  
> >  		if (fwnode_property_present(child, "diff-channels")) {
> > @@ -1033,26 +1032,25 @@ static int mcp3564_parse_fw_children(struct iio_dev *indio_dev)
> >  							     "diff-channels",
> >  							     inputs,
> >  							     ARRAY_SIZE(inputs));
> > +			if (ret)
> > +				return ret;
> > +
> >  			chanspec.differential = 1;
> >  		} else {
> >  			ret = fwnode_property_read_u32(child, "reg", &inputs[0]);
> > +			if (ret)
> > +				return ret;
> >  
> >  			chanspec.differential = 0;
> >  			inputs[1] = MCP3564_AGND;
> >  		}
> > -		if (ret) {
> > -			fwnode_handle_put(child);
> > -			return ret;
> > -		}
> >  
> >  		if (inputs[0] > MCP3564_INTERNAL_VCM ||
> > -		    inputs[1] > MCP3564_INTERNAL_VCM) {
> > -			fwnode_handle_put(child);
> > +		    inputs[1] > MCP3564_INTERNAL_VCM)
> >  			return dev_err_probe(&indio_dev->dev, -EINVAL,
> >  					     "Channel index > %d, for %s\n",
> >  					     MCP3564_INTERNAL_VCM + 1,
> >  					     node_name);
> > -		}
> >  
> >  		chanspec.address = (inputs[0] << 4) | inputs[1];
> >  		chanspec.channel = inputs[0];
> > -- 
> > 2.44.0
> > 
> >   
> 





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