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Message-Id: <20210712061041.314283145@linuxfoundation.org>
Date: Mon, 12 Jul 2021 08:11:38 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org,
Jonathan Cameron <Jonathan.Cameron@...wei.com>,
Andreas Klinger <ak@...klinger.de>,
Nuno Sá <nuno.sa@...log.com>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.12 615/700] iio: adc: mxs-lradc: Fix buffer alignment in iio_push_to_buffers_with_timestamp()
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
[ 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@...wei.com>
Cc: Andreas Klinger <ak@...klinger.de>
Reviewed-by: Nuno Sá <nuno.sa@...log.com>
Link: https://lore.kernel.org/r/20210613152301.571002-4-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
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 30e29f44ebd2..c480cb489c1a 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;
--
2.30.2
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