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    Subject[PATCH 4.19 565/639] um: Fix off by one error in IRQ enumeration
    Date
    From: Anton Ivanov <anton.ivanov@cambridgegreys.com>

    [ Upstream commit 09ccf0364ca3e94aba4093707ef433ea8014e2a4 ]

    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>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    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


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