FAILED: patch "[PATCH] i2c: qcom-cci: fix autosuspend cleanup" failed to apply to 5.15-stable tree

FAILED: patch "[PATCH] i2c: qcom-cci: fix autosuspend cleanup" failed to apply to 5.15-stable tree

[gregkh]

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 f98d4986482151a835b521a734722fe8dc5ca37d
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026090909-palpitate-shortage-3ec4@gregkh' --subject-prefix 'PATCH 5.15.y' 'HEAD^..'

Possible dependencies:



thanks,

greg k-h

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

From f98d4986482151a835b521a734722fe8dc5ca37d Mon Sep 17 00:00:00 2001
From: Guangshuo Li <lgs201920130244@gmail.com>
Date: Wed, 12 Aug 2026 17:44:25 +0800
Subject: [PATCH] i2c: qcom-cci: fix autosuspend cleanup

cci_probe() calls pm_runtime_use_autosuspend(), but the remove path
does not call the matching pm_runtime_dont_use_autosuspend() before
disabling runtime PM.

If the autosuspend delay is set to a negative value while autosuspend
is enabled, the runtime PM core increments usage_count to prevent
runtime suspend. Without undoing the autosuspend setting during
teardown, this reference is not dropped and usage_count remains
unbalanced.

Use devm_pm_runtime_set_active_enabled() to manage the runtime PM
state. Its managed cleanup disables autosuspend and runtime PM and
restores the suspended state on probe failure and driver removal.
Remove the now redundant manual runtime PM cleanup.

This issue was found by manual code inspection.

Fixes: e517526195de ("i2c: Add Qualcomm CCI I2C driver")
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
Cc: <stable@vger.kernel.org> # v5.8+
Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Reviewed-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://patch.msgid.link/20260812094425.3515179-1-lgs201920130244@gmail.com

diff --git a/drivers/i2c/busses/i2c-qcom-cci.c b/drivers/i2c/busses/i2c-qcom-cci.c
index bdeda3979c48..25b6e4e9e3fa 100644
--- a/drivers/i2c/busses/i2c-qcom-cci.c
+++ b/drivers/i2c/busses/i2c-qcom-cci.c
@@ -595,9 +595,11 @@ static int cci_probe(struct platform_device *pdev)
 		goto disable_clocks;
 
 	pm_runtime_set_autosuspend_delay(dev, MSEC_PER_SEC);
+	ret = devm_pm_runtime_set_active_enabled(dev);
+	if (ret)
+		goto disable_clocks;
+
 	pm_runtime_use_autosuspend(dev);
-	pm_runtime_set_active(dev);
-	pm_runtime_enable(dev);
 
 	for (i = 0; i < cci->data->num_masters; i++) {
 		if (!cci->master[i].cci)
@@ -613,8 +615,6 @@ static int cci_probe(struct platform_device *pdev)
 	return 0;
 
 error_i2c:
-	pm_runtime_disable(dev);
-	pm_runtime_dont_use_autosuspend(dev);
 
 	for (--i ; i >= 0; i--) {
 		if (cci->master[i].cci) {
@@ -640,9 +640,6 @@ static void cci_remove(struct platform_device *pdev)
 			cci_halt(cci, i);
 		}
 	}
-
-	pm_runtime_disable(&pdev->dev);
-	pm_runtime_set_suspended(&pdev->dev);
 }
 
 static const struct cci_data cci_v1_data = {

[PATCH 5.15.y 1/4] i2c: omap: Improve error reporting for problems during .remove()

[Sasha Levin]

From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

[ Upstream commit 9496fffcb28f39e0352779a0199b6e61861c9221 ]

If pm_runtime_get() fails in .remove() the driver used to return the
error to the driver core. The only effect of this (compared to returning
zero) is a generic warning that the error value is ignored.

So emit a better warning and return zero to suppress the generic (and
little helpful) message. Also disable runtime PM in the error case.

This prepares changing platform device remove callbacks to return void.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Stable-dep-of: f98d49864821 ("i2c: qcom-cci: fix autosuspend cleanup")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/i2c/busses/i2c-omap.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 5c045c4da660b..1cd07faecd6c5 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -1513,14 +1513,17 @@ static int omap_i2c_remove(struct platform_device *pdev)
 	int ret;
 
 	i2c_del_adapter(&omap->adapter);
-	ret = pm_runtime_resume_and_get(&pdev->dev);
+
+	ret = pm_runtime_get_sync(&pdev->dev);
 	if (ret < 0)
-		return ret;
+		dev_err(omap->dev, "Failed to resume hardware, skip disable\n");
+	else
+		omap_i2c_write_reg(omap, OMAP_I2C_CON_REG, 0);
 
-	omap_i2c_write_reg(omap, OMAP_I2C_CON_REG, 0);
 	pm_runtime_dont_use_autosuspend(&pdev->dev);
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
+
 	return 0;
 }
 
-- 
2.53.0

[PATCH 5.15.y 2/4] i2c: Convert to platform remove callback returning void

[Sasha Levin]

From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

[ Upstream commit e190a0c389e60178fba3d532abf936dcae223e7d ]

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Alain Volmat <alain.volmat@foss.st.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Acked-by: Jochen Friedrich <jochen@scram.de>
Acked-by: Peter Rosin <peda@axentia.se>
Acked-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Asmaa Mnebhi <asnaa@nvidia.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Chris Pringle <chris.pringle@phabrix.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Tali Perry <tali.perry@nuvoton.com>
Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

For this stable dependency, retain only the Qualcomm CCI conversion.
The GXP driver is absent from this tree, and the other I2C driver
conversions are unrelated to the target autosuspend fix.

Also adapt the probe/remove cleanup from upstream f0285c286bca5
("i2c: qcom-cci: Remove overcautious disable_irq() calls"). The IRQ is
already requested with devm_request_irq(), so devres releases it on
probe failure and removal. Route both the existing cci_reset() and
cci_init() failures to disable_clocks, and remove the redundant IRQ
disables and error label. This supplies the context expected by
f98d4986482151a835b521a734722fe8dc5ca37d without adding functions.

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

[ sashal: Reduced backport -- upstream e190a0c389e60 touches 88 file(s), this
  backport carries 1. Not backported here:
  drivers/i2c/busses/i2c-altera.c
  drivers/i2c/busses/i2c-amd-mp2-plat.c
  drivers/i2c/busses/i2c-aspeed.c
  drivers/i2c/busses/i2c-at91-core.c
  drivers/i2c/busses/i2c-au1550.c
  drivers/i2c/busses/i2c-axxia.c
  drivers/i2c/busses/i2c-bcm2835.c
  drivers/i2c/busses/i2c-bcm-iproc.c
  ... and 79 more
  This note is generated from the file lists only; see the resolution record
  for the reasoning. ]

Stable-dep-of: f98d49864821 ("i2c: qcom-cci: fix autosuspend cleanup")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/i2c/busses/i2c-qcom-cci.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/drivers/i2c/busses/i2c-qcom-cci.c b/drivers/i2c/busses/i2c-qcom-cci.c
index eae21899e0f3c..b3ccbea140e9d 100644
--- a/drivers/i2c/busses/i2c-qcom-cci.c
+++ b/drivers/i2c/busses/i2c-qcom-cci.c
@@ -632,11 +632,11 @@ static int cci_probe(struct platform_device *pdev)
 
 	ret = cci_reset(cci);
 	if (ret < 0)
-		goto error;
+		goto disable_clocks;
 
 	ret = cci_init(cci);
 	if (ret < 0)
-		goto error;
+		goto disable_clocks;
 
 	pm_runtime_set_autosuspend_delay(dev, MSEC_PER_SEC);
 	pm_runtime_use_autosuspend(dev);
@@ -666,15 +666,13 @@ static int cci_probe(struct platform_device *pdev)
 			of_node_put(cci->master[i].adap.dev.of_node);
 		}
 	}
-error:
-	disable_irq(cci->irq);
 disable_clocks:
 	cci_disable_clocks(cci);
 
 	return ret;
 }
 
-static int cci_remove(struct platform_device *pdev)
+static void cci_remove(struct platform_device *pdev)
 {
 	struct cci *cci = platform_get_drvdata(pdev);
 	int i;
@@ -687,11 +685,8 @@ static int cci_remove(struct platform_device *pdev)
 		}
 	}
 
-	disable_irq(cci->irq);
 	pm_runtime_disable(&pdev->dev);
 	pm_runtime_set_suspended(&pdev->dev);
-
-	return 0;
 }
 
 static const struct cci_data cci_v1_data = {
@@ -785,7 +780,7 @@ MODULE_DEVICE_TABLE(of, cci_dt_match);
 
 static struct platform_driver qcom_cci_driver = {
 	.probe  = cci_probe,
-	.remove = cci_remove,
+	.remove_new = cci_remove,
 	.driver = {
 		.name = "i2c-qcom-cci",
 		.of_match_table = cci_dt_match,
-- 
2.53.0

[PATCH 5.15.y 3/4] i2c: qcom-cci: Do not check return value of cci_init()

[Sasha Levin]

From: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>

[ Upstream commit 17c5d247e3e4708cac05ff087c8013c0dda383a2 ]

The cci_init() function is not supposed to fail, and it never returns
a non-zero, so it'd make sense to convert its signature to void.

Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Reviewed-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://lore.kernel.org/r/20260515234121.1607425-3-vladimir.zapolskiy@linaro.org

For this stable dependency, retain the existing disable_clocks cleanup
path while removing the impossible cci_init() error check.

Also fold in the initialization/reset adjustment from upstream
697d58d457e999a03c7c395ff0fbf13e765f0997 ("i2c: qcom-cci: Move
cci_init() under cci_reset() function"). Reorder the existing functions,
call cci_init() after a successful reset, and remove the now redundant
initialization calls from probe and queue timeout recovery. No functions
are added. Runtime resume continues to call cci_init() directly.

This supplies the probe context required to apply
f98d4986482151a835b521a734722fe8dc5ca37d ("i2c: qcom-cci: fix
autosuspend cleanup") without conflicts. Keep the stable tree's clock,
I2C callback, IRQ cleanup, and platform remove adaptations.

Stable-dep-of: f98d49864821 ("i2c: qcom-cci: fix autosuspend cleanup")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/i2c/busses/i2c-qcom-cci.c | 43 ++++++++++++++-----------------
 1 file changed, 19 insertions(+), 24 deletions(-)

diff --git a/drivers/i2c/busses/i2c-qcom-cci.c b/drivers/i2c/busses/i2c-qcom-cci.c
index b3ccbea140e9d..4544772361435 100644
--- a/drivers/i2c/busses/i2c-qcom-cci.c
+++ b/drivers/i2c/busses/i2c-qcom-cci.c
@@ -229,25 +229,7 @@ static int cci_halt(struct cci *cci, u8 master_num)
 	return 0;
 }
 
-static int cci_reset(struct cci *cci)
-{
-	/*
-	 * we reset the whole controller, here and for implicity use
-	 * master[0].xxx for waiting on it.
-	 */
-	reinit_completion(&cci->master[0].irq_complete);
-	writel(CCI_RESET_CMD_MASK, cci->base + CCI_RESET_CMD);
-
-	if (!wait_for_completion_timeout(&cci->master[0].irq_complete,
-					 CCI_TIMEOUT)) {
-		dev_err(cci->dev, "CCI reset timeout\n");
-		return -ETIMEDOUT;
-	}
-
-	return 0;
-}
-
-static int cci_init(struct cci *cci)
+static void cci_init(struct cci *cci)
 {
 	u32 val = CCI_IRQ_MASK_0_I2C_M0_RD_DONE |
 			CCI_IRQ_MASK_0_I2C_M0_Q0_REPORT |
@@ -288,6 +270,24 @@ static int cci_init(struct cci *cci)
 		val = hw->scl_stretch_en << 8 | hw->trdhld << 4 | hw->tsp;
 		writel(val, cci->base + CCI_I2C_Mm_MISC_CTL(i));
 	}
+}
+
+static int cci_reset(struct cci *cci)
+{
+	/*
+	 * we reset the whole controller, here and for implicity use
+	 * master[0].xxx for waiting on it.
+	 */
+	reinit_completion(&cci->master[0].irq_complete);
+	writel(CCI_RESET_CMD_MASK, cci->base + CCI_RESET_CMD);
+
+	if (!wait_for_completion_timeout(&cci->master[0].irq_complete,
+					 CCI_TIMEOUT)) {
+		dev_err(cci->dev, "CCI reset timeout\n");
+		return -ETIMEDOUT;
+	}
+
+	cci_init(cci);
 
 	return 0;
 }
@@ -308,7 +308,6 @@ static int cci_run_queue(struct cci *cci, u8 master, u8 queue)
 		dev_err(cci->dev, "master %d queue %d timeout\n",
 			master, queue);
 		cci_reset(cci);
-		cci_init(cci);
 		return -ETIMEDOUT;
 	}
 
@@ -634,10 +633,6 @@ static int cci_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto disable_clocks;
 
-	ret = cci_init(cci);
-	if (ret < 0)
-		goto disable_clocks;
-
 	pm_runtime_set_autosuspend_delay(dev, MSEC_PER_SEC);
 	pm_runtime_use_autosuspend(dev);
 	pm_runtime_set_active(dev);
-- 
2.53.0

[PATCH 5.15.y 4/4] i2c: qcom-cci: fix autosuspend cleanup

[Sasha Levin]

From: Guangshuo Li <lgs201920130244@gmail.com>

[ Upstream commit f98d4986482151a835b521a734722fe8dc5ca37d ]

cci_probe() calls pm_runtime_use_autosuspend(), but the remove path
does not call the matching pm_runtime_dont_use_autosuspend() before
disabling runtime PM.

If the autosuspend delay is set to a negative value while autosuspend
is enabled, the runtime PM core increments usage_count to prevent
runtime suspend. Without undoing the autosuspend setting during
teardown, this reference is not dropped and usage_count remains
unbalanced.

Use devm_pm_runtime_set_active_enabled() to manage the runtime PM
state. Its managed cleanup disables autosuspend and runtime PM and
restores the suspended state on probe failure and driver removal.
Remove the now redundant manual runtime PM cleanup.

This issue was found by manual code inspection.

Fixes: e517526195de ("i2c: Add Qualcomm CCI I2C driver")
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
Cc: <stable@vger.kernel.org> # v5.8+
Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Reviewed-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://patch.msgid.link/20260812094425.3515179-1-lgs201920130244@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/i2c/busses/i2c-qcom-cci.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/i2c/busses/i2c-qcom-cci.c b/drivers/i2c/busses/i2c-qcom-cci.c
index 4544772361435..30b0a47d95133 100644
--- a/drivers/i2c/busses/i2c-qcom-cci.c
+++ b/drivers/i2c/busses/i2c-qcom-cci.c
@@ -634,9 +634,11 @@ static int cci_probe(struct platform_device *pdev)
 		goto disable_clocks;
 
 	pm_runtime_set_autosuspend_delay(dev, MSEC_PER_SEC);
+	ret = devm_pm_runtime_set_active_enabled(dev);
+	if (ret)
+		goto disable_clocks;
+
 	pm_runtime_use_autosuspend(dev);
-	pm_runtime_set_active(dev);
-	pm_runtime_enable(dev);
 
 	for (i = 0; i < cci->data->num_masters; i++) {
 		if (!cci->master[i].cci)
@@ -652,8 +654,6 @@ static int cci_probe(struct platform_device *pdev)
 	return 0;
 
 error_i2c:
-	pm_runtime_disable(dev);
-	pm_runtime_dont_use_autosuspend(dev);
 
 	for (--i ; i >= 0; i--) {
 		if (cci->master[i].cci) {
@@ -679,9 +679,6 @@ static void cci_remove(struct platform_device *pdev)
 			cci_halt(cci, i);
 		}
 	}
-
-	pm_runtime_disable(&pdev->dev);
-	pm_runtime_set_suspended(&pdev->dev);
 }
 
 static const struct cci_data cci_v1_data = {
-- 
2.53.0