From a3baaf5ec281a155b866c985656df1aa6e0dea5f Mon Sep 17 00:00:00 2001
From: Bibo Mao <maobibo@loongson.cn>
Date: Fri, 11 Aug 2023 17:58:04 +0800
Subject: [PATCH] irqchip/loongson-eiointc: Fix return value checking of
eiointc_index
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[ Upstream commit 2e99b73afde18853754c5fae8e8d1a66fe5e3f64 ]
Return value of function eiointc_index is int, however it is converted
into uint32_t and then compared smaller than zero, this will cause logic
problem.
Fixes: dd281e1a1a93 ("irqchip: Add Loongson Extended I/O interrupt controller support")
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230811095805.2974722-2-maobibo@loongson.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/irqchip/irq-loongson-eiointc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/irqchip/irq-loongson-eiointc.c b/drivers/irqchip/irq-loongson-eiointc.c
index 92d8aa28bdf54..1623cd7791752 100644
--- a/drivers/irqchip/irq-loongson-eiointc.c
+++ b/drivers/irqchip/irq-loongson-eiointc.c
@@ -144,7 +144,7 @@ static int eiointc_router_init(unsigned int cpu)
int i, bit;
uint32_t data;
uint32_t node = cpu_to_eio_node(cpu);
- uint32_t index = eiointc_index(node);
+ int index = eiointc_index(node);
if (index < 0) {
pr_err("Error: invalid nodemap!\n");