patch "iio: adc: rzg2l_adc: Set driver data before enabling runtime PM" added to char-misc-linus

patch "iio: adc: rzg2l_adc: Set driver data before enabling runtime PM" added to char-misc-linus

[gregkh]

This is a note to let you know that I've just added the patch titled

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

to my char-misc git tree which can be found at
    git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
in the char-misc-linus branch.

The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.

If you have any questions about this process, please let me know.


From c69e13965f26b8058f538ea8bdbd2d7718cf1fbe Mon Sep 17 00:00:00 2001
From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Date: Sun, 10 Aug 2025 15:33:28 +0300
Subject: iio: adc: rzg2l_adc: Set driver data before enabling runtime PM

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>
---
 drivers/iio/adc/rzg2l_adc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/adc/rzg2l_adc.c b/drivers/iio/adc/rzg2l_adc.c
index 0cb5a67fd497..cadb0446bc29 100644
--- a/drivers/iio/adc/rzg2l_adc.c
+++ b/drivers/iio/adc/rzg2l_adc.c
@@ -427,6 +427,8 @@ 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);
@@ -459,8 +461,6 @@ 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,
-- 
2.50.1