[PATCH 4.19 565/639] um: Fix off by one error in IRQ enumeration

[Greg Kroah-Hartman]

From: Anton Ivanov <anton.ivanov@xxxxxxxxxxxxxxxxxx>

[ Upstream commit 09ccf0364ca3e94aba4093707ef433ea8014e2a4 ]

Fix an off-by-one in IRQ enumeration

Fixes: 49da7e64f33e ("High Performance UML Vector Network Driver")
Reported by: Dana Johnson <djohns042@xxxxxxxxx>
Signed-off-by: Anton Ivanov <anton.ivanov@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Richard Weinberger <richard@xxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 arch/um/include/asm/irq.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/um/include/asm/irq.h b/arch/um/include/asm/irq.h
index 49ed3e35b35ad..ce7a78c3bcf21 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
 
-- 
2.20.1