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

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Message-Id: <7d0cb246c9f1cd24bb1f637ec5cb67e799a4c3b8.1688908227.git.geert+renesas@glider.be>
Date:   Sun,  9 Jul 2023 15:10:43 +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: dreamcast: Handle virq offset in cascaded IRQ demux

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:
-- 
2.34.1