UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

iio: resolver: ad2s90: Fix alignment for DMA safety 

____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 tag is probably not where the issue was first introduced, but
is likely to be far beyond the point where anyone considers
backporting this fix.

Fixes: 58f08b0af8 ("staging:iio:resolver:ad2s90 general cleanup")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-90-jic23@kernel.org
This commit is contained in:
Jonathan Cameron 2022-05-08 18:57:09 +01:00
parent 37882314d3
commit faa05ecb13
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/iio/resolver/ad2s90.c
View File

@ -24,7 +24,7 @@
struct ad2s90_state {
struct mutex lock; /* lock to protect rx buffer */
struct spi_device *sdev;
u8 rx[2] ____cacheline_aligned;
u8 rx[2] __aligned(IIO_DMA_MINALIGN);
};
static int ad2s90_read_raw(struct iio_dev *indio_dev,