linux-kernel - Re: [PATCH] [RFC] sh: dreamcast: Handle virq offset in cascaded IRQ demux

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Date:   Wed, 12 Jul 2023 07:17:16 +0200
From:   John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
To:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Sergey Shtylyov <s.shtylyov@....ru>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>
Cc:     linux-sh@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [RFC] sh: dreamcast: Handle virq offset in cascaded IRQ
 demux

On Sun, 2023-07-09 at 15:10 +0200, Geert Uytterhoeven wrote:
> Take into account the virq offset when translating cascaded interrupts.
> 
> Fixes: a8ac2961148e8c72 ("sh: Avoid using IRQ0 on SH3 and SH4")
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> ---
> Compile-tested only.
> ---
>  arch/sh/boards/mach-dreamcast/irq.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/sh/boards/mach-dreamcast/irq.c b/arch/sh/boards/mach-dreamcast/irq.c
> index cc06e4cdb4cdf9b7..4e5fb59481a26747 100644
> --- a/arch/sh/boards/mach-dreamcast/irq.c
> +++ b/arch/sh/boards/mach-dreamcast/irq.c
> @@ -108,13 +108,13 @@ int systemasic_irq_demux(int irq)
>  	__u32 j, bit;
>  
>  	switch (irq) {
> -	case 13:
> +	case 16 + 13:
>  		level = 0;
>  		break;
> -	case 11:
> +	case 16 + 11:
>  		level = 1;
>  		break;
> -	case  9:
> +	case 16 + 9:
>  		level = 2;
>  		break;
>  	default:

Reviewed-by: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>

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