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staging: iio: ad5933: fix type mismatch regression

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commit 6db053cd949fcd6254cea9f2cd5d39f7bd64379c upstream.

Commit 4c3577db3e4f ("Staging: iio: impedance-analyzer: Fix sparse
warning") fixed a compiler warning, but introduced a bug that resulted
in one of the two 16 bit IIO channels always being zero (when both are
enabled).

This is because int is 32 bits wide on most architectures and in the
case of a little-endian machine the two most significant bytes would
occupy the buffer for the second channel as 'val' is being passed as a
void pointer to 'iio_push_to_buffers()'.

Fix by defining 'val' as u16. Tested working on ARM64.

Fixes: 4c3577db3e4f ("Staging: iio: impedance-analyzer: Fix sparse warning")
Signed-off-by: David Schiller <david.schiller@jku.at>
Link: https://lore.kernel.org/r/20240122134916.2137957-1-david.schiller@jku.at
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Schiller 2024-01-22 14:49:17 +01:00 committed by Greg Kroah-Hartman
parent 65bf19f55a
commit c794117a33
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/iio/impedance-analyzer/ad5933.c
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@ -608,7 +608,7 @@ static void ad5933_work(struct work_struct *work)
struct ad5933_state, work.work);
struct iio_dev *indio_dev = i2c_get_clientdata(st->client);
__be16 buf[2];
int val[2];
u16 val[2];
unsigned char status;
int ret;