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staging: IIO: IMU: ADIS16400: Make sure only enabled scan_elements are pushed into the ring

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Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
CC: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Michael Hennerich 2011-03-21 16:44:38 +01:00 committed by Greg Kroah-Hartman
parent b181119723
commit 0fea4d6192
1 changed files with 7 additions and 3 deletions
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10
drivers/staging/iio/imu/adis16400_ring.c
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@ -160,9 +160,10 @@ static void adis16400_trigger_bh_to_ring(struct work_struct *work_s)
work_trigger_to_ring);
struct iio_ring_buffer *ring = st->indio_dev->ring;
int i = 0;
int i = 0, j;
s16 *data;
size_t datasize = ring->access.get_bytes_per_datum(ring);
unsigned long mask = ring->scan_mask;
data = kmalloc(datasize , GFP_KERNEL);
if (data == NULL) {
@ -172,9 +173,12 @@ static void adis16400_trigger_bh_to_ring(struct work_struct *work_s)
if (ring->scan_count)
if (adis16400_spi_read_burst(&st->indio_dev->dev, st->rx) >= 0)
for (; i < ring->scan_count; i++)
for (; i < ring->scan_count; i++) {
j = __ffs(mask);
mask &= ~(1 << j);
data[i] = be16_to_cpup(
(__be16 *)&(st->rx[i*2]));
(__be16 *)&(st->rx[j*2]));
}
/* Guaranteed to be aligned with 8 byte boundary */
if (ring->scan_timestamp)