[PATCH 1/5 v3] iio: exynos_adc: use indio_dev->dev structure to handle child nodes

Naveen Krishna Chatradhi
2014-04-30T09:28:51Z

From: Naveen Krishna Ch <ch.naveen@samsung.com>

Using pdev->dev with device_for_each_child() would iterate over all
of the children of the platform device and delete them.
Thus, causing crashes during module unload.

We should be using the indio_dev->dev structure for
registering/unregistering child nodes.

Signed-off-by: Naveen Krishna Ch <ch.naveen@samsung.com>
Reported-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Tested-by: Doug Anderson <dianders@chromium.org>
---
Changes since v2:
None
Changes since v1:
Adding Doug's tags
v0:
This change was tested on top of
https://lkml.org/lkml/2014/4/21/481 from Doug.

drivers/iio/adc/exynos_adc.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
index d25b262..affa93f 100644
--- a/drivers/iio/adc/exynos_adc.c
+++ b/drivers/iio/adc/exynos_adc.c
@@ -344,7 +344,7 @@ static int exynos_adc_probe(struct platform_device *pdev)

exynos_adc_hw_init(info);

- ret = of_platform_populate(np, exynos_adc_match, NULL, &pdev->dev);
+ ret = of_platform_populate(np, exynos_adc_match, NULL, &indio_dev->dev);
if (ret < 0) {
dev_err(&pdev->dev, "failed adding child nodes\n");
goto err_of_populate;
@@ -353,7 +353,7 @@ static int exynos_adc_probe(struct platform_device *pdev)
return 0;

err_of_populate:
- device_for_each_child(&pdev->dev, NULL,
+ device_for_each_child(&indio_dev->dev, NULL,
exynos_adc_remove_devices);
regulator_disable(info->vdd);
clk_disable_unprepare(info->clk);
@@ -369,7 +369,7 @@ static int exynos_adc_remove(struct platform_device *pdev)
struct iio_dev *indio_dev = platform_get_drvdata(pdev);
struct exynos_adc *info = iio_priv(indio_dev);

- device_for_each_child(&pdev->dev, NULL,
+ device_for_each_child(&indio_dev->dev, NULL,
exynos_adc_remove_devices);
regulator_disable(info->vdd);
clk_disable_unprepare(info->clk);
--
1.7.9.5