iio: adc: ltc2309: Optimize chip_info structure layout

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Improve the ltc2309_chip_info structure with better type safety and
memory efficiency:

- Add __counted_by_ptr() annotation to the channels pointer, linking
  it to num_channels for improved bounds checking and kernel hardening
- Reorder structure fields to minimize padding:
  * Place read_delay_us before num_channels
  * This reduces struct size and eliminates internal gaps
- Reorder field initialization to match the structure definition order

The __counted_by_ptr() attribute enables compile-time and runtime
verification that array accesses to channels[] stay within the bounds
specified by num_channels, improving memory safety.

Signed-off-by: Carlos Jones Jr <carlosjr.jones@analog.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

...

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Carlos Jones Jr 2026-03-31 09:24:57 +08:00 • committed by Jonathan Cameron

parent 671b8541c7

commit 7a89047a36

1 changed files with 3 additions and 3 deletions

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drivers/iio/adc/ltc2309.c

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