FAILED: patch "[PATCH] iio: imu: inv_mpu6050: stabilized timestamping in interrupt" failed to apply to 6.9-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 6.9-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-6.9.y
git checkout FETCH_HEAD
git cherry-pick -x 8844ed0a6e063acf7173b231021b2d301e31ded9
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2024061729-roundness-hurled-7533@gregkh' --subject-prefix 'PATCH 6.9.y' HEAD^..

Possible dependencies:

8844ed0a6e06 ("iio: imu: inv_mpu6050: stabilized timestamping in interrupt")
bf8367b00c33 ("iio: invensense: fix timestamp glitches when switching frequency")
a1432b5b4f4c ("iio: imu: inv_icm42600: add support of ICM-42686-P")
5537f653d9be ("iio: imu: inv_mpu6050: add new interrupt handler for WoM events")

thanks,

greg k-h

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

From 8844ed0a6e063acf7173b231021b2d301e31ded9 Mon Sep 17 00:00:00 2001
From: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
Date: Mon, 27 May 2024 15:01:17 +0000
Subject: [PATCH] iio: imu: inv_mpu6050: stabilized timestamping in interrupt

Use IRQ ONESHOT flag to ensure the timestamp is not updated in the
hard handler during the thread handler. And use a fixed value of 1
sample that correspond to this first timestamp.

This way we can ensure the timestamp is always corresponding to the
value used by the timestamping mechanism. Otherwise, it is possible
that between FIFO count read and FIFO processing the timestamp is
overwritten in the hard handler.

Fixes: 111e1abd0045 ("iio: imu: inv_mpu6050: use the common inv_sensors timestamp module")
Cc: stable@vger.kernel.org
Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
Link: https://lore.kernel.org/r/20240527150117.608792-1-inv.git-commit@tdk.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
index 0dc0f22a5582..3d3b27f28c9d 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
@@ -100,8 +100,8 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p)
 		goto end_session;
 	/* Each FIFO data contains all sensors, so same number for FIFO and sensor data */
 	fifo_period = NSEC_PER_SEC / INV_MPU6050_DIVIDER_TO_FIFO_RATE(st->chip_config.divider);
-	inv_sensors_timestamp_interrupt(&st->timestamp, nb, pf->timestamp);
-	inv_sensors_timestamp_apply_odr(&st->timestamp, fifo_period, nb, 0);
+	inv_sensors_timestamp_interrupt(&st->timestamp, 1, pf->timestamp);
+	inv_sensors_timestamp_apply_odr(&st->timestamp, fifo_period, 1, 0);
 
 	/* clear internal data buffer for avoiding kernel data leak */
 	memset(data, 0, sizeof(data));
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c
index 1b603567ccc8..84273660ca2e 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c
@@ -300,6 +300,7 @@ int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev, int irq_type)
 	if (!st->trig)
 		return -ENOMEM;
 
+	irq_type |= IRQF_ONESHOT;
 	ret = devm_request_threaded_irq(&indio_dev->dev, st->irq,
 					&inv_mpu6050_interrupt_timestamp,
 					&inv_mpu6050_interrupt_handle,