linux-kernel - [PATCH v2] genirq/timings: Fix error return code in irq_timings_test

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Date:   Wed, 11 Aug 2021 17:33:32 +0800
From:   Zhen Lei <thunder.leizhen@...wei.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        <linux-kernel@...r.kernel.org>
CC:     Zhen Lei <thunder.leizhen@...wei.com>
Subject: [PATCH v2] genirq/timings: Fix error return code in irq_timings_test_irqs()

Fix to return a negative error code from the error handling case instead
of 0, as done elsewhere in this function.

Fixes: f52da98d900e ("genirq/timings: Add selftest for irqs circular buffer")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
---
 kernel/irq/timings.c | 2 ++
 1 file changed, 2 insertions(+)

v1 --> v2:
Replace -EFAULT with two more appropriate error codes.

diff --git a/kernel/irq/timings.c b/kernel/irq/timings.c
index d309d6fbf5bd..59affb3bfdfa 100644
--- a/kernel/irq/timings.c
+++ b/kernel/irq/timings.c
@@ -794,12 +794,14 @@ static int __init irq_timings_test_irqs(struct timings_intervals *ti)
 
 		__irq_timings_store(irq, irqs, ti->intervals[i]);
 		if (irqs->circ_timings[i & IRQ_TIMINGS_MASK] != index) {
+			ret = -EBADSLT;
 			pr_err("Failed to store in the circular buffer\n");
 			goto out;
 		}
 	}
 
 	if (irqs->count != ti->count) {
+		ret = -ERANGE;
 		pr_err("Count differs\n");
 		goto out;
 	}
-- 
2.25.1