[libcamera-devel] [PATCH 08/10] ipa: raspberrypi: Re-use iterator variable

[David Plowman]

Hi Kieran

Thanks for tidying this!

On Tue, 13 Oct 2020 at 16:12, Kieran Bingham
<kieran.bingham at ideasonboard.com> wrote:
>
> The function gauss_seidel2_SOR() makes use of a function scoped iterator
> 'i', for several loops, and has a precedence of re-using the function
> scoped iterator declaration, but then proceeds to alias the iterator
> with a new declaration in one of the later loops.
>
> Re-use the existing iterator variable for consistency, and to prevent
> variable aliasing.
>
> Signed-off-by: Kieran Bingham <kieran.bingham at ideasonboard.com>

Reviewed-by: David Plowman <david.plowman at raspberrypi.com>

> ---
>  src/ipa/raspberrypi/controller/rpi/alsc.cpp | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/src/ipa/raspberrypi/controller/rpi/alsc.cpp b/src/ipa/raspberrypi/controller/rpi/alsc.cpp
> index 42fbc8a476ad..8447f8bec18b 100644
> --- a/src/ipa/raspberrypi/controller/rpi/alsc.cpp
> +++ b/src/ipa/raspberrypi/controller/rpi/alsc.cpp
> @@ -628,7 +628,7 @@ static double gauss_seidel2_SOR(double const M[XY][4], double omega,
>                 lambda[i] = compute_lambda_bottom(i, M, lambda);
>         lambda[0] = compute_lambda_bottom_start(0, M, lambda);
>         double max_diff = 0;
> -       for (int i = 0; i < XY; i++) {
> +       for (i = 0; i < XY; i++) {
>                 lambda[i] = old_lambda[i] + (lambda[i] - old_lambda[i]) * omega;
>                 if (fabs(lambda[i] - old_lambda[i]) > fabs(max_diff))
>                         max_diff = lambda[i] - old_lambda[i];
> --
> 2.25.1
>
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