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authorJonathan Cameron <Jonathan.Cameron@huawei.com>2021-06-13 18:22:56 +0300
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2021-06-14 13:42:41 +0300
commit6a6be221b8bd561b053f0701ec752a5ed9007f69 (patch)
tree4d9fb82e9b0aa905b47f4f3b265a0974ac850986 /drivers/iio/adc
parentafe2a789fbf7acd1a05407fc7839cc08d23825e3 (diff)
downloadlinux-6a6be221b8bd561b053f0701ec752a5ed9007f69.tar.xz
iio: adc: mxs-lradc: Fix buffer alignment in iio_push_to_buffers_with_timestamp()
To make code more readable, use a structure to express the channel layout and ensure the timestamp is 8 byte aligned. Add a comment on why the buffer is the size it is as not immediately obvious. Found during an audit of all calls of this function. Fixes: 6dd112b9f85e ("iio: adc: mxs-lradc: Add support for ADC driver") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Andreas Klinger <ak@it-klinger.de> Reviewed-by: Nuno Sá <nuno.sa@analog.com> Link: https://lore.kernel.org/r/20210613152301.571002-4-jic23@kernel.org
Diffstat (limited to 'drivers/iio/adc')
-rw-r--r--drivers/iio/adc/mxs-lradc-adc.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/iio/adc/mxs-lradc-adc.c b/drivers/iio/adc/mxs-lradc-adc.c
index 1d99170d3328..bca79a93cbe4 100644
--- a/drivers/iio/adc/mxs-lradc-adc.c
+++ b/drivers/iio/adc/mxs-lradc-adc.c
@@ -115,7 +115,8 @@ struct mxs_lradc_adc {
struct device *dev;
void __iomem *base;
- u32 buffer[10];
+ /* Maximum of 8 channels + 8 byte ts */
+ u32 buffer[10] __aligned(8);
struct iio_trigger *trig;
struct completion completion;
spinlock_t lock;