iio: imu: mpu6050: Fix alignment for DMA safety

[ Upstream commit 54e03562bb960e78af050d2e550c28d77642ee44 ]

____cacheline_aligned is an insufficient guarantee for non-coherent DMA
on platforms with 128 byte cachelines above L1.  Switch to the updated
IIO_DMA_MINALIGN definition.

Fixes: 6b0cc5dce072 ("iio:imu:inv_mpu6050 Fix dma and ts alignment and data leak issues.")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-80-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
index c6aa36ee966a432e7376bdaea374b682a7bba484..32b58b797d573eb081424d31802fefdc5606f00b 100644 (file)
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
@@ -203,7 +203,7 @@ struct inv_mpu6050_state {
        s32 magn_raw_to_gauss[3];
        struct iio_mount_matrix magn_orient;
        unsigned int suspended_sensors;
-       u8 data[INV_MPU6050_OUTPUT_DATA_SIZE] ____cacheline_aligned;
+       u8 data[INV_MPU6050_OUTPUT_DATA_SIZE] __aligned(IIO_DMA_MINALIGN);
 };
 
 /*register and associated bit definition*/