The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x c774f2564c0086c23f5269fd4691f233756bf075 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024100119-lather-concept-f5c2@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^..

Possible dependencies:

c774f2564c00 ("soc: versatile: realview: fix soc_dev leak during device remove") 1c4f26a41f9d ("soc: versatile: realview: fix memory leak during device remove")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From c774f2564c0086c23f5269fd4691f233756bf075 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org Date: Sun, 25 Aug 2024 20:05:24 +0200 Subject: [PATCH] soc: versatile: realview: fix soc_dev leak during device remove

If device is unbound, the soc_dev should be unregistered to prevent memory leak.

Fixes: a2974c9c1f83 ("soc: add driver for the ARM RealView") Cc: stable@vger.kernel.org Signed-off-by: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org Link: https://lore.kernel.org/20240825-soc-dev-fixes-v1-3-ff4b35abed83@linaro.org Signed-off-by: Linus Walleij linus.walleij@linaro.org

diff --git a/drivers/soc/versatile/soc-realview.c b/drivers/soc/versatile/soc-realview.c index d304ee69287a..cf91abe07d38 100644 --- a/drivers/soc/versatile/soc-realview.c +++ b/drivers/soc/versatile/soc-realview.c @@ -4,6 +4,7 @@ * * Author: Linus Walleij linus.walleij@linaro.org */ +#include <linux/device.h> #include <linux/init.h> #include <linux/io.h> #include <linux/slab.h> @@ -81,6 +82,13 @@ static struct attribute *realview_attrs[] = {

ATTRIBUTE_GROUPS(realview);

+static void realview_soc_socdev_release(void *data) +{ + struct soc_device *soc_dev = data; + + soc_device_unregister(soc_dev); +} + static int realview_soc_probe(struct platform_device *pdev) { struct regmap *syscon_regmap; @@ -109,6 +117,11 @@ static int realview_soc_probe(struct platform_device *pdev) if (IS_ERR(soc_dev)) return -ENODEV;

+ ret = devm_add_action_or_reset(&pdev->dev, realview_soc_socdev_release, + soc_dev); + if (ret) + return ret; + ret = regmap_read(syscon_regmap, REALVIEW_SYS_ID_OFFSET, &realview_coreid); if (ret)