Patch "mtd: rawnand: atmel: fix possible object reference leak" has been added to the 4.14-stable tree

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

mtd: rawnand: atmel: fix possible object reference leak

to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
mtd-rawnand-atmel-fix-possible-object-reference-leak.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From a12085d13997ed15f745f33a0e01002541160179 Mon Sep 17 00:00:00 2001
From: Wen Yang <[email protected]>
Date: Thu, 7 Feb 2019 03:50:55 +0000
Subject: mtd: rawnand: atmel: fix possible object reference leak

From: Wen Yang <[email protected]>

commit a12085d13997ed15f745f33a0e01002541160179 upstream.

of_find_device_by_node() takes a reference to the struct device when it finds a match via get_device, there is no need to call get_device() twice.
We also should make sure to drop the reference to the device taken by of_find_device_by_node() on driver unbind.

---
 drivers/mtd/nand/atmel/pmecc.c |   21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

@@ -875,23 +875,32 @@ static struct atmel_pmecc *atmel_pmecc_g
 {
 	struct platform_device *pdev;
 	struct atmel_pmecc *pmecc, **ptr;
+	int ret;
 
 	pdev = of_find_device_by_node(np);
-	if (!pdev || !platform_get_drvdata(pdev))
+	if (!pdev)
 		return ERR_PTR(-EPROBE_DEFER);
+	pmecc = platform_get_drvdata(pdev);
+	if (!pmecc) {
+		ret = -EPROBE_DEFER;
+		goto err_put_device;
+	}
 
 	ptr = devres_alloc(devm_atmel_pmecc_put, sizeof(*ptr), GFP_KERNEL);
-	if (!ptr)
-		return ERR_PTR(-ENOMEM);
-
-	get_device(&pdev->dev);
-	pmecc = platform_get_drvdata(pdev);
+	if (!ptr) {
+		ret = -ENOMEM;
+		goto err_put_device;
+	}
 
 	*ptr = pmecc;
 
 	devres_add(userdev, ptr);
 
 	return pmecc;
+
+err_put_device:
+	put_device(&pdev->dev);
+	return ERR_PTR(ret);
 }
 
 static const int atmel_pmecc_strengths[] = { 2, 4, 8, 12, 24, 32 };

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/mtd-rawnand-atmel-fix-possible-object-reference-leak.patch

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