FAILED: patch "[PATCH] iio: pressure: mpl115: fix runtime PM leak on read error" failed to apply to 6.12-stable tree

FAILED: patch "[PATCH] iio: pressure: mpl115: fix runtime PM leak on read error" failed to apply to 6.12-stable tree

[gregkh]

The patch below does not apply to the 6.12-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-6.12.y
git checkout FETCH_HEAD
git cherry-pick -x fbe67ff37a6fd855a6c097f84f3738bd13d0a898
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026071351-alphabet-sleep-d297@gregkh' --subject-prefix 'PATCH 6.12.y' 'HEAD^..'

Possible dependencies:



thanks,

greg k-h

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

From fbe67ff37a6fd855a6c097f84f3738bd13d0a898 Mon Sep 17 00:00:00 2001
From: Biren Pandya <birenpandya@gmail.com>
Date: Sun, 14 Jun 2026 12:45:48 +0530
Subject: [PATCH] iio: pressure: mpl115: fix runtime PM leak on read error

mpl115_read_raw() takes a runtime PM reference with pm_runtime_get_sync()
before reading the processed pressure or raw temperature, but on the read
error path it returns without calling pm_runtime_put_autosuspend(). Each
failed read therefore leaks a runtime PM reference and prevents the device
from autosuspending.

Drop the reference before checking the return value so both the success
and error paths are balanced.

Fixes: 0c3a333524a3 ("iio: pressure: mpl115: Implementing low power mode by shutdown gpio")
Signed-off-by: Biren Pandya <birenpandya@gmail.com>
Assisted-by: Claude:claude-opus-4-8 coccinelle
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/iio/pressure/mpl115.c b/drivers/iio/pressure/mpl115.c
index 830a5065c008..16e112b796ba 100644
--- a/drivers/iio/pressure/mpl115.c
+++ b/drivers/iio/pressure/mpl115.c
@@ -106,18 +106,18 @@ static int mpl115_read_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_PROCESSED:
 		pm_runtime_get_sync(data->dev);
 		ret = mpl115_comp_pressure(data, val, val2);
+		pm_runtime_put_autosuspend(data->dev);
 		if (ret < 0)
 			return ret;
-		pm_runtime_put_autosuspend(data->dev);
 
 		return IIO_VAL_INT_PLUS_MICRO;
 	case IIO_CHAN_INFO_RAW:
 		pm_runtime_get_sync(data->dev);
 		/* temperature -5.35 C / LSB, 472 LSB is 25 C */
 		ret = mpl115_read_temp(data);
+		pm_runtime_put_autosuspend(data->dev);
 		if (ret < 0)
 			return ret;
-		pm_runtime_put_autosuspend(data->dev);
 		*val = ret >> 6;
 
 		return IIO_VAL_INT;

[PATCH 6.12.y 1/2] iio: pressure: Remove redundant pm_runtime_mark_last_busy() calls

[Sasha Levin]

From: Sakari Ailus <sakari.ailus@linux.intel.com>

[ Upstream commit dfb68a8ebb2e8d9af6e356ae0806bfd8e854ab44 ]

pm_runtime_put_autosuspend(), pm_runtime_put_sync_autosuspend(),
pm_runtime_autosuspend() and pm_request_autosuspend() now include a call
to pm_runtime_mark_last_busy(). Remove the now-reduntant explicit call to
pm_runtime_mark_last_busy().

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Link: https://patch.msgid.link/20250825135401.1765847-11-sakari.ailus@linux.intel.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Stable-dep-of: fbe67ff37a6f ("iio: pressure: mpl115: fix runtime PM leak on read error")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/iio/pressure/bmp280-core.c | 5 -----
 drivers/iio/pressure/icp10100.c    | 1 -
 drivers/iio/pressure/mpl115.c      | 2 --
 drivers/iio/pressure/zpa2326.c     | 2 --
 4 files changed, 10 deletions(-)

diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
index 9e46aa65acef77..088b13ac2d9d1b 100644
--- a/drivers/iio/pressure/bmp280-core.c
+++ b/drivers/iio/pressure/bmp280-core.c
@@ -747,7 +747,6 @@ static int bmp280_read_raw(struct iio_dev *indio_dev,
 
 	pm_runtime_get_sync(data->dev);
 	ret = bmp280_read_raw_impl(indio_dev, chan, val, val2, mask);
-	pm_runtime_mark_last_busy(data->dev);
 	pm_runtime_put_autosuspend(data->dev);
 
 	return ret;
@@ -922,7 +921,6 @@ static int bmp280_write_raw(struct iio_dev *indio_dev,
 
 	pm_runtime_get_sync(data->dev);
 	ret = bmp280_write_raw_impl(indio_dev, chan, val, val2, mask);
-	pm_runtime_mark_last_busy(data->dev);
 	pm_runtime_put_autosuspend(data->dev);
 
 	return ret;
@@ -1951,7 +1949,6 @@ static int bmp580_nvmem_read(void *priv, unsigned int offset, void *val,
 
 	pm_runtime_get_sync(data->dev);
 	ret = bmp580_nvmem_read_impl(priv, offset, val, bytes);
-	pm_runtime_mark_last_busy(data->dev);
 	pm_runtime_put_autosuspend(data->dev);
 
 	return ret;
@@ -2026,7 +2023,6 @@ static int bmp580_nvmem_write(void *priv, unsigned int offset, void *val,
 
 	pm_runtime_get_sync(data->dev);
 	ret = bmp580_nvmem_write_impl(priv, offset, val, bytes);
-	pm_runtime_mark_last_busy(data->dev);
 	pm_runtime_put_autosuspend(data->dev);
 
 	return ret;
@@ -2634,7 +2630,6 @@ static int bmp280_buffer_postdisable(struct iio_dev *indio_dev)
 {
 	struct bmp280_data *data = iio_priv(indio_dev);
 
-	pm_runtime_mark_last_busy(data->dev);
 	pm_runtime_put_autosuspend(data->dev);
 
 	return 0;
diff --git a/drivers/iio/pressure/icp10100.c b/drivers/iio/pressure/icp10100.c
index 3e0bf5d31ad7a4..ff6b36b5927c1f 100644
--- a/drivers/iio/pressure/icp10100.c
+++ b/drivers/iio/pressure/icp10100.c
@@ -265,7 +265,6 @@ static int icp10100_get_measures(struct icp10100_state *st,
 			(be16_to_cpu(measures[1]) >> 8);
 	*temperature = be16_to_cpu(measures[2]);
 
-	pm_runtime_mark_last_busy(&st->client->dev);
 error_measure:
 	pm_runtime_put_autosuspend(&st->client->dev);
 	return ret;
diff --git a/drivers/iio/pressure/mpl115.c b/drivers/iio/pressure/mpl115.c
index 02ea38c8a3e431..18c2488e182cdc 100644
--- a/drivers/iio/pressure/mpl115.c
+++ b/drivers/iio/pressure/mpl115.c
@@ -108,7 +108,6 @@ static int mpl115_read_raw(struct iio_dev *indio_dev,
 		ret = mpl115_comp_pressure(data, val, val2);
 		if (ret < 0)
 			return ret;
-		pm_runtime_mark_last_busy(data->dev);
 		pm_runtime_put_autosuspend(data->dev);
 
 		return IIO_VAL_INT_PLUS_MICRO;
@@ -118,7 +117,6 @@ static int mpl115_read_raw(struct iio_dev *indio_dev,
 		ret = mpl115_read_temp(data);
 		if (ret < 0)
 			return ret;
-		pm_runtime_mark_last_busy(data->dev);
 		pm_runtime_put_autosuspend(data->dev);
 		*val = ret >> 6;
 
diff --git a/drivers/iio/pressure/zpa2326.c b/drivers/iio/pressure/zpa2326.c
index 8fae58db1d6393..4146396755b64f 100644
--- a/drivers/iio/pressure/zpa2326.c
+++ b/drivers/iio/pressure/zpa2326.c
@@ -699,7 +699,6 @@ static void zpa2326_suspend(struct iio_dev *indio_dev)
 
 	zpa2326_sleep(indio_dev);
 
-	pm_runtime_mark_last_busy(parent);
 	pm_runtime_put_autosuspend(parent);
 }
 
@@ -710,7 +709,6 @@ static void zpa2326_init_runtime(struct device *parent)
 	pm_runtime_enable(parent);
 	pm_runtime_set_autosuspend_delay(parent, 1000);
 	pm_runtime_use_autosuspend(parent);
-	pm_runtime_mark_last_busy(parent);
 	pm_runtime_put_autosuspend(parent);
 }
 
-- 
2.53.0

[PATCH 6.12.y 2/2] iio: pressure: mpl115: fix runtime PM leak on read error

[Sasha Levin]

From: Biren Pandya <birenpandya@gmail.com>

[ Upstream commit fbe67ff37a6fd855a6c097f84f3738bd13d0a898 ]

mpl115_read_raw() takes a runtime PM reference with pm_runtime_get_sync()
before reading the processed pressure or raw temperature, but on the read
error path it returns without calling pm_runtime_put_autosuspend(). Each
failed read therefore leaks a runtime PM reference and prevents the device
from autosuspending.

Drop the reference before checking the return value so both the success
and error paths are balanced.

Fixes: 0c3a333524a3 ("iio: pressure: mpl115: Implementing low power mode by shutdown gpio")
Signed-off-by: Biren Pandya <birenpandya@gmail.com>
Assisted-by: Claude:claude-opus-4-8 coccinelle
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/iio/pressure/mpl115.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/pressure/mpl115.c b/drivers/iio/pressure/mpl115.c
index 18c2488e182cdc..11ee879f4da440 100644
--- a/drivers/iio/pressure/mpl115.c
+++ b/drivers/iio/pressure/mpl115.c
@@ -106,18 +106,18 @@ static int mpl115_read_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_PROCESSED:
 		pm_runtime_get_sync(data->dev);
 		ret = mpl115_comp_pressure(data, val, val2);
+		pm_runtime_put_autosuspend(data->dev);
 		if (ret < 0)
 			return ret;
-		pm_runtime_put_autosuspend(data->dev);
 
 		return IIO_VAL_INT_PLUS_MICRO;
 	case IIO_CHAN_INFO_RAW:
 		pm_runtime_get_sync(data->dev);
 		/* temperature -5.35 C / LSB, 472 LSB is 25 C */
 		ret = mpl115_read_temp(data);
+		pm_runtime_put_autosuspend(data->dev);
 		if (ret < 0)
 			return ret;
-		pm_runtime_put_autosuspend(data->dev);
 		*val = ret >> 6;
 
 		return IIO_VAL_INT;
-- 
2.53.0

[PATCH 6.12.y] iio: pressure: mpl115: fix runtime PM leak on read error

[Sasha Levin]

From: Biren Pandya <birenpandya@gmail.com>

[ Upstream commit fbe67ff37a6fd855a6c097f84f3738bd13d0a898 ]

mpl115_read_raw() takes a runtime PM reference with pm_runtime_get_sync()
before reading the processed pressure or raw temperature, but on the read
error path it returns without calling pm_runtime_put_autosuspend(). Each
failed read therefore leaks a runtime PM reference and prevents the device
from autosuspending.

Drop the reference before checking the return value so both the success
and error paths are balanced.

Fixes: 0c3a333524a3 ("iio: pressure: mpl115: Implementing low power mode by shutdown gpio")
Signed-off-by: Biren Pandya <birenpandya@gmail.com>
Assisted-by: Claude:claude-opus-4-8 coccinelle
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
[ moved pm_runtime_mark_last_busy() together with pm_runtime_put_autosuspend() ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/iio/pressure/mpl115.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/pressure/mpl115.c b/drivers/iio/pressure/mpl115.c
index 02ea38c8a3e431..e3eb154feb5fde 100644
--- a/drivers/iio/pressure/mpl115.c
+++ b/drivers/iio/pressure/mpl115.c
@@ -106,20 +106,20 @@ static int mpl115_read_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_PROCESSED:
 		pm_runtime_get_sync(data->dev);
 		ret = mpl115_comp_pressure(data, val, val2);
-		if (ret < 0)
-			return ret;
 		pm_runtime_mark_last_busy(data->dev);
 		pm_runtime_put_autosuspend(data->dev);
+		if (ret < 0)
+			return ret;
 
 		return IIO_VAL_INT_PLUS_MICRO;
 	case IIO_CHAN_INFO_RAW:
 		pm_runtime_get_sync(data->dev);
 		/* temperature -5.35 C / LSB, 472 LSB is 25 C */
 		ret = mpl115_read_temp(data);
-		if (ret < 0)
-			return ret;
 		pm_runtime_mark_last_busy(data->dev);
 		pm_runtime_put_autosuspend(data->dev);
+		if (ret < 0)
+			return ret;
 		*val = ret >> 6;
 
 		return IIO_VAL_INT;
-- 
2.53.0

[PATCH 6.12.y 2/2] iio: pressure: mpl115: fix runtime PM leak on read error

[Sasha Levin]

From: Biren Pandya <birenpandya@gmail.com>

[ Upstream commit fbe67ff37a6fd855a6c097f84f3738bd13d0a898 ]

mpl115_read_raw() takes a runtime PM reference with pm_runtime_get_sync()
before reading the processed pressure or raw temperature, but on the read
error path it returns without calling pm_runtime_put_autosuspend(). Each
failed read therefore leaks a runtime PM reference and prevents the device
from autosuspending.

Drop the reference before checking the return value so both the success
and error paths are balanced.

Fixes: 0c3a333524a3 ("iio: pressure: mpl115: Implementing low power mode by shutdown gpio")
Signed-off-by: Biren Pandya <birenpandya@gmail.com>
Assisted-by: Claude:claude-opus-4-8 coccinelle
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/iio/pressure/mpl115.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/pressure/mpl115.c b/drivers/iio/pressure/mpl115.c
index 18c2488e182cdc..11ee879f4da440 100644
--- a/drivers/iio/pressure/mpl115.c
+++ b/drivers/iio/pressure/mpl115.c
@@ -106,18 +106,18 @@ static int mpl115_read_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_PROCESSED:
 		pm_runtime_get_sync(data->dev);
 		ret = mpl115_comp_pressure(data, val, val2);
+		pm_runtime_put_autosuspend(data->dev);
 		if (ret < 0)
 			return ret;
-		pm_runtime_put_autosuspend(data->dev);
 
 		return IIO_VAL_INT_PLUS_MICRO;
 	case IIO_CHAN_INFO_RAW:
 		pm_runtime_get_sync(data->dev);
 		/* temperature -5.35 C / LSB, 472 LSB is 25 C */
 		ret = mpl115_read_temp(data);
+		pm_runtime_put_autosuspend(data->dev);
 		if (ret < 0)
 			return ret;
-		pm_runtime_put_autosuspend(data->dev);
 		*val = ret >> 6;
 
 		return IIO_VAL_INT;
-- 
2.53.0