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authorJonathan Cameron <Jonathan.Cameron@huawei.com>2021-06-13 16:22:54 +0100
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2021-06-14 11:42:41 +0100
commit8f884758966259fa8c50c137ac6d4ce9bb7859db (patch)
treed5e23393037dcb6159ca7fc0a9beb694a1d3aa49 /drivers/iio
parentbc84957d3118df7c05724a0c0e693ffe038d5409 (diff)
downloadlinux-8f884758966259fa8c50c137ac6d4ce9bb7859db.tar.bz2
iio: adc: at91-sama5d2: 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. Found during an audit of all calls of this function. Fixes: 5e1a1da0f8c9 ("iio: adc: at91-sama5d2_adc: add hw trigger and buffer support") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Eugen Hristev <eugen.hristev@microchip.com> Reviewed-by: Nuno Sá <nuno.sa@analog.com> Link: https://lore.kernel.org/r/20210613152301.571002-2-jic23@kernel.org
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/adc/at91-sama5d2_adc.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c
index 6e8c28675947..ea5ca163d879 100644
--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c
@@ -403,7 +403,8 @@ struct at91_adc_state {
struct at91_adc_dma dma_st;
struct at91_adc_touch touch_st;
struct iio_dev *indio_dev;
- u16 buffer[AT91_BUFFER_MAX_HWORDS];
+ /* Ensure naturally aligned timestamp */
+ u16 buffer[AT91_BUFFER_MAX_HWORDS] __aligned(8);
/*
* lock to prevent concurrent 'single conversion' requests through
* sysfs.