linux-kernel - [PATCH 4.14 105/164] irqchip/qcom: Fix u32 comparison with value less than zero

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Date:   Tue, 12 Dec 2017 13:44:45 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Colin Ian King <colin.king@...onical.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <marc.zyngier@....com>,
        kernel-janitors@...r.kernel.org,
        Jason Cooper <jason@...edaemon.net>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.14 105/164] irqchip/qcom: Fix u32 comparison with value less than zero

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Colin Ian King <colin.king@...onical.com>


[ Upstream commit e9990d70e8a063a7b894c5cbb99f630a0f41200d ]

The comparison of u32 nregs being less than zero is never true since
nregs is unsigned. Fix this by making nregs a signed integer.

Fixes: f20cc9b00c7b ("irqchip/qcom: Add IRQ combiner driver")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Marc Zyngier <marc.zyngier@....com>
Cc: kernel-janitors@...r.kernel.org
Cc: Jason Cooper <jason@...edaemon.net>
Link: https://lkml.kernel.org/r/20171117183553.2739-1-colin.king@canonical.com
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/irqchip/qcom-irq-combiner.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/irqchip/qcom-irq-combiner.c
+++ b/drivers/irqchip/qcom-irq-combiner.c
@@ -238,7 +238,7 @@ static int __init combiner_probe(struct
 {
 	struct combiner *combiner;
 	size_t alloc_sz;
-	u32 nregs;
+	int nregs;
 	int err;
 
 	nregs = count_registers(pdev);