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[5.4,310/348] iio: adc: hx711: Fix buffer alignment in iio_push_to_buffers_with_timestamp()

Message ID 20210712060744.970589325@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman July 12, 2021, 6:11 a.m. UTC 
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>


[ Upstream commit afe2a789fbf7acd1a05407fc7839cc08d23825e3 ]

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: d3bf60450d47 ("iio: hx711: add triggered buffer support")
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/20210613152301.571002-3-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

---
 drivers/iio/adc/hx711.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

-- 
2.30.2
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Patch

diff --git a/drivers/iio/adc/hx711.c b/drivers/iio/adc/hx711.c
index 62e6c8badd22..a3265166fd83 100644
--- a/drivers/iio/adc/hx711.c
+++ b/drivers/iio/adc/hx711.c
@@ -85,9 +85,9 @@  struct hx711_data {
 	struct mutex		lock;
 	/*
 	 * triggered buffer
-	 * 2x32-bit channel + 64-bit timestamp
+	 * 2x32-bit channel + 64-bit naturally aligned timestamp
 	 */
-	u32			buffer[4];
+	u32			buffer[4] __aligned(8);
 	/*
 	 * delay after a rising edge on SCK until the data is ready DOUT
 	 * this is dependent on the hx711 where the datasheet tells a