linux-kernel - [PATCH] [RFC] sh: highlander: Handle virq offset in cascaded IRL demux

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Message-Id: <4fcb0d08a2b372431c41e04312742dc9e41e1be4.1688908186.git.geert+renesas@glider.be>
Date:   Sun,  9 Jul 2023 15:10:23 +0200
From:   Geert Uytterhoeven <geert+renesas@...der.be>
To:     Sergey Shtylyov <s.shtylyov@....ru>,
        John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>
Cc:     linux-sh@...r.kernel.org, linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH] [RFC] sh: highlander: Handle virq offset in cascaded IRL demux

Take into account the virq offset when translating cascaded IRL
interrupts.

Fixes: a8ac2961148e8c72 ("sh: Avoid using IRQ0 on SH3 and SH4")
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
Compile-tested only, but the fix is identical to the fix for rts7751r2d.
---
 arch/sh/boards/mach-highlander/setup.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/sh/boards/mach-highlander/setup.c b/arch/sh/boards/mach-highlander/setup.c
index 533393d779c2b97f..a821a1b155473d93 100644
--- a/arch/sh/boards/mach-highlander/setup.c
+++ b/arch/sh/boards/mach-highlander/setup.c
@@ -389,10 +389,10 @@ static unsigned char irl2irq[HL_NR_IRL];
 
 static int highlander_irq_demux(int irq)
 {
-	if (irq >= HL_NR_IRL || irq < 0 || !irl2irq[irq])
+	if (irq >= 16 + HL_NR_IRL || irq < 16 || !irl2irq[irq - 16])
 		return irq;
 
-	return irl2irq[irq];
+	return irl2irq[irq - 16];
 }
 
 static void __init highlander_init_irq(void)
-- 
2.34.1