[PATCH v4 1/4] backlight: qcom-wled: Fix NULL pointer dereference in wled_remove()

[David Heidelberg via B4 Relay <devnull+david.ixit.cz@kernel.org>]

From: David Heidelberg <david@ixit.cz>

wled_probe() doesn't set the driver data for the platform device.
As a result, platform_get_drvdata() in wled_remove() will return NULL,
and the first dereference of it crashes on unbind.

Set the platform device driver data in wled_probe().

Cc: stable@vger.kernel.org
Fixes: feeab87b3072 ("backlight: qcom-wled: Add support for short circuit handling")
Signed-off-by: David Heidelberg <david@ixit.cz>
---
 drivers/video/backlight/qcom-wled.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c
index 650dd95f06ef5..2281007bdd459 100644
--- a/drivers/video/backlight/qcom-wled.c
+++ b/drivers/video/backlight/qcom-wled.c
@@ -1675,16 +1675,17 @@ static int wled_probe(struct platform_device *pdev)
 	}
 
 	wled = devm_kzalloc(&pdev->dev, sizeof(*wled), GFP_KERNEL);
 	if (!wled)
 		return -ENOMEM;
 
 	wled->regmap = regmap;
 	wled->dev = &pdev->dev;
+	platform_set_drvdata(pdev, wled);
 
 	wled->version = (uintptr_t)of_device_get_match_data(&pdev->dev);
 	if (!wled->version) {
 		dev_err(&pdev->dev, "Unknown device version\n");
 		return -ENODEV;
 	}
 
 	mutex_init(&wled->lock);

-- 
2.55.0