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[2/2] iio: adc: ad7923: Fix undersized rx buffer.

Message ID 20210501165314.511954-3-jic23@kernel.org (mailing list archive)
State New, archived
Headers show
Series IIO: Alignment fixes part 1 - sizes too small as well. | expand

Commit Message

Jonathan Cameron May 1, 2021, 4:53 p.m. UTC 
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Fixes tag is where the max channels became 8, but timestamp space was missing
before that.

Fixes: 851644a60d20 ("iio: adc: ad7923: Add support for the ad7908/ad7918/ad7928")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Daniel Junho <djunho@gmail.com>
---
 drivers/iio/adc/ad7923.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/iio/adc/ad7923.c b/drivers/iio/adc/ad7923.c
index 9a649745cd0a..069b561ee768 100644
--- a/drivers/iio/adc/ad7923.c
+++ b/drivers/iio/adc/ad7923.c
@@ -59,8 +59,10 @@  struct ad7923_state {
 	/*
 	 * DMA (thus cache coherency maintenance) requires the
 	 * transfer buffers to live in their own cache lines.
+	 * Ensure rx_buf can be directly used in iio_push_to_buffers_with_timetamp
+	 * Length = 8 channels + 4 extra for 8 byte timestamp
 	 */
-	__be16				rx_buf[4] ____cacheline_aligned;
+	__be16				rx_buf[12] ____cacheline_aligned;
 	__be16				tx_buf[4];
 };