FAILED: patch "[PATCH] ASoC: codecs: wcd9335: Fix SLIM interface device leak in wcd9335_slim_status()" failed to apply to 5.15-stable tree

FAILED: patch "[PATCH] ASoC: codecs: wcd9335: Fix SLIM interface device leak in wcd9335_slim_status()" failed to apply to 5.15-stable tree

[Sasha Levin]

The patch below does not apply to the 5.15-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-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x 082723fee626532f176727b6438b666a96d5246c
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '20261107060034-failed-5.15-082723fee626@kernel.org' --subject-prefix 'PATCH 5.15.y' 'HEAD^..'

Thanks,
Sasha

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

From 082723fee626532f176727b6438b666a96d5246c Mon Sep 17 00:00:00 2001
From: Wentao Liang <vulab@iscas.ac.cn>
Date: Thu, 17 Sep 2026 16:48:53 +0000
Subject: [PATCH] ASoC: codecs: wcd9335: Fix SLIM interface device leak in
 wcd9335_slim_status()

of_slim_get_device() returns a device with an elevated reference count,
and wcd->slim_ifc_dev is intentionally kept for the codec lifetime on
success. However, all the failure paths of wcd9335_slim_status() return
without dropping that reference, leaking the SLIM interface device
whenever the register maps cannot be created or the codec fails to come
up.

Put the device on each of those error paths.

Fixes: 20aedafdf492 ("ASoC: wcd9335: add support to wcd9335 codec")
Cc: stable@vger.kernel.org
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
Link: https://patch.msgid.link/20260917164853.2163184-1-vulab@iscas.ac.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/wcd9335.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/sound/soc/codecs/wcd9335.c b/sound/soc/codecs/wcd9335.c
index 9332082092c79..a98d1fd789251 100644
--- a/sound/soc/codecs/wcd9335.c
+++ b/sound/soc/codecs/wcd9335.c
@@ -5135,25 +5135,32 @@ static int wcd9335_slim_status(struct slim_device *sdev,
 	slim_get_logical_addr(wcd->slim_ifc_dev);
 
 	wcd->regmap = regmap_init_slimbus(sdev, &wcd9335_regmap_config);
-	if (IS_ERR(wcd->regmap))
+	if (IS_ERR(wcd->regmap)) {
+		put_device(&wcd->slim_ifc_dev->dev);
 		return dev_err_probe(dev, PTR_ERR(wcd->regmap),
 				     "Failed to allocate slim register map\n");
+	}
 
 	wcd->if_regmap = regmap_init_slimbus(wcd->slim_ifc_dev,
 						  &wcd9335_ifc_regmap_config);
-	if (IS_ERR(wcd->if_regmap))
+	if (IS_ERR(wcd->if_regmap)) {
+		put_device(&wcd->slim_ifc_dev->dev);
 		return dev_err_probe(dev, PTR_ERR(wcd->if_regmap),
 				     "Failed to allocate ifc register map\n");
+	}
 
 	ret = wcd9335_bring_up(wcd);
 	if (ret) {
 		dev_err(dev, "Failed to bringup WCD9335\n");
+		put_device(&wcd->slim_ifc_dev->dev);
 		return ret;
 	}
 
 	ret = wcd9335_irq_init(wcd);
-	if (ret)
+	if (ret) {
+		put_device(&wcd->slim_ifc_dev->dev);
 		return ret;
+	}
 
 	wcd9335_probe(wcd);
 
-- 
2.53.0

[PATCH 5.15.y 1/2] ASoC: codecs: wcd9335: Simplify with dev_err_probe

[Sasha Levin]

From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

[ Upstream commit 67380533d450000699848e292d20ec18d0321f0e ]

Code can be a bit simpler with dev_err_probe().

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230417141453.919158-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Stable-dep-of: 082723fee626 ("ASoC: codecs: wcd9335: Fix SLIM interface device leak in wcd9335_slim_status()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/soc/codecs/wcd9335.c | 27 +++++++++++----------------
 1 file changed, 11 insertions(+), 16 deletions(-)

diff --git a/sound/soc/codecs/wcd9335.c b/sound/soc/codecs/wcd9335.c
index 4170d8dc3e89f..24c3d1c28a294 100644
--- a/sound/soc/codecs/wcd9335.c
+++ b/sound/soc/codecs/wcd9335.c
@@ -5130,20 +5130,17 @@ static int wcd9335_irq_init(struct wcd9335_codec *wcd)
 	 * INTR2 is a subset of first interrupt sources MAD, VBAT, and SVA
 	 */
 	wcd->intr1 = of_irq_get_byname(wcd->dev->of_node, "intr1");
-	if (wcd->intr1 < 0) {
-		if (wcd->intr1 != -EPROBE_DEFER)
-			dev_err(wcd->dev, "Unable to configure IRQ\n");
-
-		return wcd->intr1;
-	}
+	if (wcd->intr1 < 0)
+		return dev_err_probe(wcd->dev, wcd->intr1,
+				     "Unable to configure IRQ\n");
 
 	ret = devm_regmap_add_irq_chip(wcd->dev, wcd->regmap, wcd->intr1,
 				 IRQF_TRIGGER_HIGH, 0,
 				 &wcd9335_regmap_irq1_chip, &wcd->irq_data);
 	if (ret)
-		dev_err(wcd->dev, "Failed to register IRQ chip: %d\n", ret);
+		return dev_err_probe(wcd->dev, ret, "Failed to register IRQ chip\n");
 
-	return ret;
+	return 0;
 }
 
 static int wcd9335_slim_probe(struct slim_device *slim)
@@ -5211,17 +5208,15 @@ static int wcd9335_slim_status(struct slim_device *sdev,
 	slim_get_logical_addr(wcd->slim_ifc_dev);
 
 	wcd->regmap = regmap_init_slimbus(sdev, &wcd9335_regmap_config);
-	if (IS_ERR(wcd->regmap)) {
-		dev_err(dev, "Failed to allocate slim register map\n");
-		return PTR_ERR(wcd->regmap);
-	}
+	if (IS_ERR(wcd->regmap))
+		return dev_err_probe(dev, PTR_ERR(wcd->regmap),
+				     "Failed to allocate slim register map\n");
 
 	wcd->if_regmap = regmap_init_slimbus(wcd->slim_ifc_dev,
 						  &wcd9335_ifc_regmap_config);
-	if (IS_ERR(wcd->if_regmap)) {
-		dev_err(dev, "Failed to allocate ifc register map\n");
-		return PTR_ERR(wcd->if_regmap);
-	}
+	if (IS_ERR(wcd->if_regmap))
+		return dev_err_probe(dev, PTR_ERR(wcd->if_regmap),
+				     "Failed to allocate ifc register map\n");
 
 	ret = wcd9335_bring_up(wcd);
 	if (ret) {
-- 
2.53.0

[PATCH 5.15.y 2/2] ASoC: codecs: wcd9335: Fix SLIM interface device leak in wcd9335_slim_status()

[Sasha Levin]

From: Wentao Liang <vulab@iscas.ac.cn>

[ Upstream commit 082723fee626532f176727b6438b666a96d5246c ]

of_slim_get_device() returns a device with an elevated reference count,
and wcd->slim_ifc_dev is intentionally kept for the codec lifetime on
success. However, all the failure paths of wcd9335_slim_status() return
without dropping that reference, leaking the SLIM interface device
whenever the register maps cannot be created or the codec fails to come
up.

Put the device on each of those error paths.

Fixes: 20aedafdf492 ("ASoC: wcd9335: add support to wcd9335 codec")
Cc: stable@vger.kernel.org
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
Link: https://patch.msgid.link/20260917164853.2163184-1-vulab@iscas.ac.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/soc/codecs/wcd9335.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/sound/soc/codecs/wcd9335.c b/sound/soc/codecs/wcd9335.c
index 24c3d1c28a294..61da127dbe11e 100644
--- a/sound/soc/codecs/wcd9335.c
+++ b/sound/soc/codecs/wcd9335.c
@@ -5208,25 +5208,32 @@ static int wcd9335_slim_status(struct slim_device *sdev,
 	slim_get_logical_addr(wcd->slim_ifc_dev);
 
 	wcd->regmap = regmap_init_slimbus(sdev, &wcd9335_regmap_config);
-	if (IS_ERR(wcd->regmap))
+	if (IS_ERR(wcd->regmap)) {
+		put_device(&wcd->slim_ifc_dev->dev);
 		return dev_err_probe(dev, PTR_ERR(wcd->regmap),
 				     "Failed to allocate slim register map\n");
+	}
 
 	wcd->if_regmap = regmap_init_slimbus(wcd->slim_ifc_dev,
 						  &wcd9335_ifc_regmap_config);
-	if (IS_ERR(wcd->if_regmap))
+	if (IS_ERR(wcd->if_regmap)) {
+		put_device(&wcd->slim_ifc_dev->dev);
 		return dev_err_probe(dev, PTR_ERR(wcd->if_regmap),
 				     "Failed to allocate ifc register map\n");
+	}
 
 	ret = wcd9335_bring_up(wcd);
 	if (ret) {
 		dev_err(dev, "Failed to bringup WCD9335\n");
+		put_device(&wcd->slim_ifc_dev->dev);
 		return ret;
 	}
 
 	ret = wcd9335_irq_init(wcd);
-	if (ret)
+	if (ret) {
+		put_device(&wcd->slim_ifc_dev->dev);
 		return ret;
+	}
 
 	wcd9335_probe(wcd);
 
-- 
2.53.0