iio: adis16400: Set timestamp as the last element in chan_spec

This is necessary since timestamp is calculated as the last element
in iio_compute_scan_bytes().

Without this fix any userspace code reading the layout of the buffer via
sysfs will incorrectly interpret the data leading some nasty corruption.

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: stable@vger.kernel.org
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

2 files changed, 6 insertions, 5 deletions

diff --git a/drivers/iio/imu/adis16400.h b/drivers/iio/imu/adis16400.h
index 2f8f9d632386..0916bf6b6c31 100644
--- a/drivers/iio/imu/adis16400.h
+++ b/drivers/iio/imu/adis16400.h
@@ -189,6 +189,7 @@ enum {
         ADIS16300_SCAN_INCLI_X,
         ADIS16300_SCAN_INCLI_Y,
         ADIS16400_SCAN_ADC,
+        ADIS16400_SCAN_TIMESTAMP,
 };
 
 #ifdef CONFIG_IIO_BUFFER
diff --git a/drivers/iio/imu/adis16400_core.c b/drivers/iio/imu/adis16400_core.c
index 368660dfe135..7c582f7ae34e 100644
--- a/drivers/iio/imu/adis16400_core.c
+++ b/drivers/iio/imu/adis16400_core.c
@@ -632,7 +632,7 @@ static const struct iio_chan_spec adis16400_channels[] = {
         ADIS16400_MAGN_CHAN(Z, ADIS16400_ZMAGN_OUT, 14),
         ADIS16400_TEMP_CHAN(ADIS16400_TEMP_OUT, 12),
         ADIS16400_AUX_ADC_CHAN(ADIS16400_AUX_ADC, 12),
-        IIO_CHAN_SOFT_TIMESTAMP(12)
+        IIO_CHAN_SOFT_TIMESTAMP(ADIS16400_SCAN_TIMESTAMP),
 };
 
 static const struct iio_chan_spec adis16448_channels[] = {
@@ -659,7 +659,7 @@ static const struct iio_chan_spec adis16448_channels[] = {
                 },
         },
         ADIS16400_TEMP_CHAN(ADIS16448_TEMP_OUT, 12),
-        IIO_CHAN_SOFT_TIMESTAMP(11)
+        IIO_CHAN_SOFT_TIMESTAMP(ADIS16400_SCAN_TIMESTAMP),
 };
 
 static const struct iio_chan_spec adis16350_channels[] = {
@@ -677,7 +677,7 @@ static const struct iio_chan_spec adis16350_channels[] = {
         ADIS16400_MOD_TEMP_CHAN(X, ADIS16350_XTEMP_OUT, 12),
         ADIS16400_MOD_TEMP_CHAN(Y, ADIS16350_YTEMP_OUT, 12),
         ADIS16400_MOD_TEMP_CHAN(Z, ADIS16350_ZTEMP_OUT, 12),
-        IIO_CHAN_SOFT_TIMESTAMP(11)
+        IIO_CHAN_SOFT_TIMESTAMP(ADIS16400_SCAN_TIMESTAMP),
 };
 
 static const struct iio_chan_spec adis16300_channels[] = {
@@ -690,7 +690,7 @@ static const struct iio_chan_spec adis16300_channels[] = {
         ADIS16400_AUX_ADC_CHAN(ADIS16300_AUX_ADC, 12),
         ADIS16400_INCLI_CHAN(X, ADIS16300_PITCH_OUT, 13),
         ADIS16400_INCLI_CHAN(Y, ADIS16300_ROLL_OUT, 13),
-        IIO_CHAN_SOFT_TIMESTAMP(14)
+        IIO_CHAN_SOFT_TIMESTAMP(ADIS16400_SCAN_TIMESTAMP),
 };
 
 static const struct iio_chan_spec adis16334_channels[] = {
@@ -701,7 +701,7 @@ static const struct iio_chan_spec adis16334_channels[] = {
         ADIS16400_ACCEL_CHAN(Y, ADIS16400_YACCL_OUT, 14),
         ADIS16400_ACCEL_CHAN(Z, ADIS16400_ZACCL_OUT, 14),
         ADIS16400_TEMP_CHAN(ADIS16350_XTEMP_OUT, 12),
-        IIO_CHAN_SOFT_TIMESTAMP(8)
+        IIO_CHAN_SOFT_TIMESTAMP(ADIS16400_SCAN_TIMESTAMP),
 };
 
 static struct attribute *adis16400_attributes[] = {