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iio: adc: at91-sama5d2: Fix buffer alignment in iio_push_to_buffers_with_timestamp()

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[ Upstream commit 8f88475896 ]

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: 5e1a1da0f8 ("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
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jonathan Cameron
2021-06-13 16:22:54 +01:00
committed by Greg Kroah-Hartman
parent 2abfa52947
commit 2abfdd6132
1 changed files with 2 additions and 1 deletions
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3
drivers/iio/adc/at91-sama5d2_adc.c
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@@ -403,7 +403,8 @@ struct at91_adc_state {
struct at91_adc_dma dma_st; struct at91_adc_dma dma_st;
struct at91_adc_touch touch_st; struct at91_adc_touch touch_st;
struct iio_dev *indio_dev; 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 * lock to prevent concurrent 'single conversion' requests through
* sysfs. * sysfs.