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commit81a91abab1upstream. lpic_gsi_to_irq() should return a valid Linux interrupt number if acpi_register_gsi() succeeds, and return 0 otherwise. But lpic_gsi_to_irq() converts a negative return value of acpi_register_gsi() to a positive value silently. Convert the return value explicitly. Fixes:e8bba72b39("irqchip / ACPI: Introduce ACPI_IRQ_MODEL_LPIC for LoongArch") Reported-by: Miao Wang <shankerwangmiao@gmail.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20240723064508.35560-1-chenhuacai@loongson.cn Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>