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[RESEND,3/8] iio: adc: mxs-lradc: Fix buffer alignment in iio_push_to_buffers_with_timestamp()

Message ID 20210613152301.571002-4-jic23@kernel.org (mailing list archive)
State Accepted
Headers show
Series IIO: Alignment fixes part 3 - __aligned(8) used to ensure alignment | expand

Commit Message

Jonathan Cameron June 13, 2021, 3:22 p.m. UTC 
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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>
---
 drivers/iio/adc/mxs-lradc-adc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

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;