iio: adc: rzg2l_adc: Set driver data before enabling runtime PM

commit c69e13965f26b8058f538ea8bdbd2d7718cf1fbe upstream.

When stress-testing the system by repeatedly unbinding and binding the ADC
device in a loop, and the ADC is a supplier for another device (e.g., a
thermal hardware block that reads temperature through the ADC), it may
happen that the ADC device is runtime-resumed immediately after runtime PM
is enabled, triggered by its consumer. At this point, since drvdata is not
yet set and the driver's runtime PM callbacks rely on it, a crash can
occur. To avoid this, set drvdata just after it was allocated.

Fixes: 89ee8174e8c8 ("iio: adc: rzg2l_adc: Simplify the runtime PM code")
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Link: https://patch.msgid.link/20250810123328.800104-3-claudiu.beznea.uj@bp.renesas.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/iio/adc/rzg2l_adc.c b/drivers/iio/adc/rzg2l_adc.c
index 9674d48074c9a7d88b0378159ad3659754a884d7..1fb2d2ddad68bbbd47c6108e6d4855f8e13de55d 100644 (file)
--- a/drivers/iio/adc/rzg2l_adc.c
+++ b/drivers/iio/adc/rzg2l_adc.c
@@ -428,6 +428,8 @@ static int rzg2l_adc_probe(struct platform_device *pdev)
        if (!indio_dev)
                return -ENOMEM;
 
+       platform_set_drvdata(pdev, indio_dev);
+
        adc = iio_priv(indio_dev);
 
        adc->hw_params = device_get_match_data(dev);
@@ -460,8 +462,6 @@ static int rzg2l_adc_probe(struct platform_device *pdev)
        if (ret)
                return ret;
 
-       platform_set_drvdata(pdev, indio_dev);
-
        ret = rzg2l_adc_hw_init(dev, adc);
        if (ret)
                return dev_err_probe(&pdev->dev, ret,