[PATCH 5.10.y-cip 19/24] iio: adc: rzg2l_adc: add missing fwnode_handle_put() in rzg2l_adc_parse_properties()


Biju Das
 

From: Jialin Zhang <zhangjialin11@...>

commit d836715f588ea15f905f607c27bc693587058db4 upstream.

fwnode_handle_put() should be used when terminating
device_for_each_child_node() iteration with break or return to prevent
stale device node references from being left behind.

Fixes: d484c21bacfa ("iio: adc: Add driver for Renesas RZ/G2L A/D converter")
Reported-by: Hulk Robot <hulkci@...>
Signed-off-by: Jialin Zhang <zhangjialin11@...>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...>
Reviewed-by: Geert Uytterhoeven <geert+renesas@...>
Link: https://lore.kernel.org/r/20220517033526.2035735-1-zhangjialin11@huawei.com
Cc: <Stable@...>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...>
Signed-off-by: Biju Das <biju.das.jz@...>
---
drivers/iio/adc/rzg2l_adc.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/adc/rzg2l_adc.c b/drivers/iio/adc/rzg2l_adc.c
index 38fccb7bcd65..b36048d7015d 100644
--- a/drivers/iio/adc/rzg2l_adc.c
+++ b/drivers/iio/adc/rzg2l_adc.c
@@ -323,11 +323,15 @@ static int rzg2l_adc_parse_properties(struct platform_device *pdev, struct rzg2l
i = 0;
device_for_each_child_node(&pdev->dev, fwnode) {
ret = fwnode_property_read_u32(fwnode, "reg", &channel);
- if (ret)
+ if (ret) {
+ fwnode_handle_put(fwnode);
return ret;
+ }

- if (channel >= RZG2L_ADC_MAX_CHANNELS)
+ if (channel >= RZG2L_ADC_MAX_CHANNELS) {
+ fwnode_handle_put(fwnode);
return -EINVAL;
+ }

chan_array[i].type = IIO_VOLTAGE;
chan_array[i].indexed = 1;
--
2.25.1

Join cip-dev@lists.cip-project.org to automatically receive all group messages.