From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Use the newly introduce iio_push_to_buffers_with_ts_unaligned() function
to ensure a bounce buffer is used to provide the required alignment and
space padding needed by the IIO core which requires the timestamp
is naturally aligned. There will be a performance cost to this change
but it will ensure the driver works on platforms that do not support
unaligned 8 byte assignments, and with consumer drivers that may
assume natural alignment of the timestamp.
Issue found as part of an audit of all calls to
iio_push_to_buffers_with_timestamp()
Fixes: 7e87d11c9bda ("iio: adc: Add support for TI ADC108S102 and ADC128S102")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Cc: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
---
drivers/iio/adc/ti-adc108s102.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/iio/adc/ti-adc108s102.c b/drivers/iio/adc/ti-adc108s102.c
index db902aef2abe..c8e48881c37f 100644
--- a/drivers/iio/adc/ti-adc108s102.c
+++ b/drivers/iio/adc/ti-adc108s102.c
@@ -75,9 +75,9 @@ struct adc108s102_state {
* rx_buf: |XX|R0|R1|R2|R3|R4|R5|R6|R7|tt|tt|tt|tt|
*
* tx_buf: 8 channel read commands, plus 1 dummy command
- * rx_buf: 1 dummy response, 8 channel responses, plus 64-bit timestamp
+ * rx_buf: 1 dummy response, 8 channel responses
*/
- __be16 rx_buf[13] ____cacheline_aligned;
+ __be16 rx_buf[9] ____cacheline_aligned;
__be16 tx_buf[9] ____cacheline_aligned;
};
@@ -149,9 +149,10 @@ static irqreturn_t adc108s102_trigger_handler(int irq, void *p)
goto out_notify;
/* Skip the dummy response in the first slot */
- iio_push_to_buffers_with_timestamp(indio_dev,
- (u8 *)&st->rx_buf[1],
- iio_get_time_ns(indio_dev));
+ iio_push_to_buffers_with_ts_unaligned(indio_dev,
+ &st->rx_buf[1],
+ st->ring_xfer.len - sizeof(st->rx_buf[1]),
+ iio_get_time_ns(indio_dev));
out_notify:
iio_trigger_notify_done(indio_dev->trig);
--
2.32.0
