linux-kernel - [PATCH v4 09/14] irqchip/mscc-ocelot: Fix potential resource leaks

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Message-Id: <1593569786-11500-10-git-send-email-yangtiezhu@loongson.cn>
Date:   Wed,  1 Jul 2020 10:16:21 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <maz@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Markus Elfring <Markus.Elfring@....de>
Subject: [PATCH v4 09/14] irqchip/mscc-ocelot: Fix potential resource leaks

In the function ocelot_irq_init(), system resource "parent_irq"
was not released in a few error cases. Thus add jump target for
the completion of the desired exception handling.

Fixes: 19d99164480a ("irqchip: Add a driver for the Microsemi Ocelot controller")
Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 drivers/irqchip/irq-mscc-ocelot.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-mscc-ocelot.c b/drivers/irqchip/irq-mscc-ocelot.c
index 88143c0..e676ae2 100644
--- a/drivers/irqchip/irq-mscc-ocelot.c
+++ b/drivers/irqchip/irq-mscc-ocelot.c
@@ -73,7 +73,8 @@ static int __init ocelot_irq_init(struct device_node *node,
 				       &irq_generic_chip_ops, NULL);
 	if (!domain) {
 		pr_err("%pOFn: unable to add irq domain\n", node);
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto err_irq_dispose;
 	}
 
 	ret = irq_alloc_domain_generic_chips(domain, OCELOT_NR_IRQ, 1,
@@ -109,9 +110,10 @@ static int __init ocelot_irq_init(struct device_node *node,
 
 err_gc_free:
 	irq_free_generic_chip(gc);
-
 err_domain_remove:
 	irq_domain_remove(domain);
+err_irq_dispose:
+	irq_dispose_mapping(parent_irq);
 
 	return ret;
 }
-- 
2.1.0