[PATCH v3 3/5] lib: utils/irqchip: plic: Fix the off-by-one error in plic_context_init()

[Anup Patel]

On Sun, Dec 11, 2022 at 12:24 PM Bin Meng <bmeng at tinylab.org> wrote:
>
> The number of interrupt enable register in words was once correct,
> but was wrongly changed to have an off-by-one error since
> commit 8c362e7d065e ("lib: irqchip/plic: Factor out a context init function").
>
> Fixes: 8c362e7d065e ("lib: irqchip/plic: Factor out a context init function")
> Signed-off-by: Bin Meng <bmeng at tinylab.org>
> Reviewed-by: Anup Patel <anup at brainfault.org>

Applied this patch to the riscv/opensbi repo.

Thanks,
Anup

>
> ---
>
> (no changes since v2)
>
> Changes in v2:
> - new patch: lib: utils/irqchip: plic: Fix the off-by-one error in plic_context_init()
>
>  lib/utils/irqchip/plic.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/lib/utils/irqchip/plic.c b/lib/utils/irqchip/plic.c
> index dca5678..568f814 100644
> --- a/lib/utils/irqchip/plic.c
> +++ b/lib/utils/irqchip/plic.c
> @@ -127,7 +127,7 @@ int plic_context_init(const struct plic_data *plic, int context_id,
>         if (!plic || context_id < 0)
>                 return SBI_EINVAL;
>
> -       ie_words = (plic->num_src + 31) / 32;
> +       ie_words = plic->num_src / 32 + 1;
>         ie_value = enable ? 0xffffffffU : 0U;
>
>         for (u32 i = 0; i < ie_words; i++)
> --
> 2.34.1
>