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iio: sca3000: Potential endian bug in sca3000_read_event_value()

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The problem is that "ret" is an int but we're casting it as
"(unsigned long *)&ret" when we do the for_each_set_bit() loop.  This
will not work on big endian 64 bit systems.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Dan Carpenter 2019-06-21 12:18:28 +03:00 committed by Jonathan Cameron
parent 05b8bcc962
commit aabcbfe8db
1 changed files with 4 additions and 3 deletions
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7
drivers/iio/accel/sca3000.c
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@ -872,8 +872,9 @@ static int sca3000_read_event_value(struct iio_dev *indio_dev,
enum iio_event_info info, enum iio_event_info info,
int *val, int *val2) int *val, int *val2)
{ {
int ret, i;
struct sca3000_state *st = iio_priv(indio_dev); struct sca3000_state *st = iio_priv(indio_dev);
long ret;
int i;
switch (info) { switch (info) {
case IIO_EV_INFO_VALUE: case IIO_EV_INFO_VALUE:
@ -885,11 +886,11 @@ static int sca3000_read_event_value(struct iio_dev *indio_dev,
return ret; return ret;
*val = 0; *val = 0;
if (chan->channel2 == IIO_MOD_Y) if (chan->channel2 == IIO_MOD_Y)
for_each_set_bit(i, (unsigned long *)&ret, for_each_set_bit(i, &ret,
ARRAY_SIZE(st->info->mot_det_mult_y)) ARRAY_SIZE(st->info->mot_det_mult_y))
*val += st->info->mot_det_mult_y[i]; *val += st->info->mot_det_mult_y[i];
else else
for_each_set_bit(i, (unsigned long *)&ret, for_each_set_bit(i, &ret,
ARRAY_SIZE(st->info->mot_det_mult_xz)) ARRAY_SIZE(st->info->mot_det_mult_xz))
*val += st->info->mot_det_mult_xz[i]; *val += st->info->mot_det_mult_xz[i];