Re: [PATCH 2/4] iio: adc: ad7124: fix config comparison
From: Jonathan Cameron
Date: Sat Aug 03 2024 - 11:04:36 EST
On Wed, 31 Jul 2024 15:37:23 +0300
Dumitru Ceclan <mitrutzceclan@xxxxxxxxx> wrote:
> The ad7124_find_similar_live_cfg() computes the compare size by
> substracting the address of the cfg struct from the address of the live
> field. Because the live field is the first field in the struct, the
> result is 0.
>
> Also, the memcmp() call is made from the start of the cfg struct, which
> includes the live and cfg_slot fields, which are not relevant for the
> comparison.
>
> Fix by grouping the relevant fields with struct_group() and use the
> size of the group to compute the compare size; make the memcmp() call
> from the address of the group.
>
> Fixes: 7b8d045e497a ("iio: adc: ad7124: allow more than 8 channels")
> Signed-off-by: Dumitru Ceclan <dumitru.ceclan@xxxxxxxxxx>
Applied to the fixes-togreg branch of iio.git and marked for stable.