From: Jonathan Cameron Jonathan.Cameron@huawei.com
stable inclusion from linux-4.19.198 commit 3e8164ccaebee06b6df3c7ad776bb69edd60ec4d
--------------------------------
[ Upstream commit 6a6be221b8bd561b053f0701ec752a5ed9007f69 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/iio/adc/mxs-lradc-adc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/adc/mxs-lradc-adc.c b/drivers/iio/adc/mxs-lradc-adc.c index c627513d9f0f2..fc8b70d8d64c9 100644 --- a/drivers/iio/adc/mxs-lradc-adc.c +++ b/drivers/iio/adc/mxs-lradc-adc.c @@ -124,7 +124,8 @@ 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;