From: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Date: Fri, 12 Jul 2019 11:51:27 +0000 (+0100)
Subject: um: Fix off by one error in IRQ enumeration
X-Git-Tag: v5.4.17~2662^2~24
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=09ccf0364ca3e94aba4093707ef433ea8014e2a4;p=arm%2Flinux.git

um: Fix off by one error in IRQ enumeration

Fix an off-by-one in IRQ enumeration

Fixes: 49da7e64f33e ("High Performance UML Vector Network Driver")
Reported by: Dana Johnson <djohns042@gmail.com>
Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
---

diff --git a/arch/um/include/asm/irq.h b/arch/um/include/asm/irq.h
index 49ed3e35b35a..ce7a78c3bcf2 100644
--- a/arch/um/include/asm/irq.h
+++ b/arch/um/include/asm/irq.h
@@ -23,7 +23,7 @@
 #define VECTOR_BASE_IRQ		15
 #define VECTOR_IRQ_SPACE	8
 
-#define LAST_IRQ (VECTOR_IRQ_SPACE + VECTOR_BASE_IRQ)
+#define LAST_IRQ (VECTOR_IRQ_SPACE + VECTOR_BASE_IRQ - 1)
 
 #else