linux-kernel - Re: [PATCH] [RFT] sh: mach-r2d: Handle virq offset in cascaded IRL demux

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Message-ID: <d92853f1a37158d37fefcc84b59efae9b0fb903b.camel@physik.fu-berlin.de>
Date:   Sun, 09 Jul 2023 13:58:28 +0200
From:   John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
To:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Guenter Roeck <linux@...ck-us.net>,
        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] [RFT] sh: mach-r2d: Handle virq offset in cascaded IRL
 demux

Hi!

On Sun, 2023-07-09 at 13:15 +0200, Geert Uytterhoeven wrote:
> diff --git a/arch/sh/boards/mach-r2d/irq.c b/arch/sh/boards/mach-r2d/irq.c
> index e34f81e9ae813b8d..c37b40398c5bc83e 100644
> --- a/arch/sh/boards/mach-r2d/irq.c
> +++ b/arch/sh/boards/mach-r2d/irq.c
> @@ -117,10 +117,10 @@ static unsigned char irl2irq[R2D_NR_IRL];
>  
>  int rts7751r2d_irq_demux(int irq)
>  {
> -	if (irq >= R2D_NR_IRL || irq < 0 || !irl2irq[irq])
> +	if (irq >= 16 + R2D_NR_IRL || irq < 16 || !irl2irq[irq - 16])
>  		return irq;
>  
> -	return irl2irq[irq];
> +	return irl2irq[irq - 16];
>  }
>  
>  /*

Btw, I think this needs to be adjusted to test for "ret <= 0" since IRQs cannot
be zero anymore, correct?

> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/mfd/sm501.c#n1389

Adrian

-- 
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: :' :  Debian Developer
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