Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Tiezhu Yang <yangtiezhu@loongson.cn>
To:     Thomas Gleixner <tglx@linutronix.de>,
        Jason Cooper <jason@lakedaemon.net>,
        Marc Zyngier <maz@kernel.org>
Cc:     linux-kernel@vger.kernel.org,
        Markus Elfring <Markus.Elfring@web.de>
Subject: [PATCH v4 10/14] irqchip/nvic: Fix potential resource leaks
Date:   Wed,  1 Jul 2020 10:16:22 +0800
Message-Id: <1593569786-11500-11-git-send-email-yangtiezhu@loongson.cn>
In-Reply-To: <1593569786-11500-1-git-send-email-yangtiezhu@loongson.cn>
References: <1593569786-11500-1-git-send-email-yangtiezhu@loongson.cn>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

In the function nvic_of_init(), system resource "nvic_base" and
"nvic_irq_domain" were not released in a few error cases. Thus add
jump targets for the completion of the desired exception handling.

Fixes: 292ec080491d ("irqchip: Add support for ARMv7-M NVIC")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
---
 drivers/irqchip/irq-nvic.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/irqchip/irq-nvic.c b/drivers/irqchip/irq-nvic.c
index f747e22..cd17f5d 100644
--- a/drivers/irqchip/irq-nvic.c
+++ b/drivers/irqchip/irq-nvic.c
@@ -94,7 +94,8 @@ static int __init nvic_of_init(struct device_node *node,
 
 	if (!nvic_irq_domain) {
 		pr_warn("Failed to allocate irq domain\n");
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto err_iounmap;
 	}
 
 	ret = irq_alloc_domain_generic_chips(nvic_irq_domain, 32, 1,
@@ -102,8 +103,7 @@ static int __init nvic_of_init(struct device_node *node,
 					     clr, 0, IRQ_GC_INIT_MASK_CACHE);
 	if (ret) {
 		pr_warn("Failed to allocate irq chips\n");
-		irq_domain_remove(nvic_irq_domain);
-		return ret;
+		goto err_domain_remove;
 	}
 
 	for (i = 0; i < numbanks; ++i) {
@@ -129,5 +129,11 @@ static int __init nvic_of_init(struct device_node *node,
 		writel_relaxed(0, nvic_base + NVIC_IPR + i);
 
 	return 0;
+
+err_domain_remove:
+	irq_domain_remove(nvic_irq_domain);
+err_iounmap:
+	iounmap(nvic_base);
+	return ret;
 }
 IRQCHIP_DECLARE(armv7m_nvic, "arm,armv7m-nvic", nvic_of_init);
-- 
2.1.0