linux-kernel - [PATCH AUTOSEL 5.15 17/29] irqchip/nvic: Release nvic

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Date:   Mon, 28 Mar 2022 07:21:19 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     "Souptick Joarder (HPE)" <jrdr.linux@...il.com>,
        kernel test robot <lkp@...el.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Marc Zyngier <maz@...nel.org>, Sasha Levin <sashal@...nel.org>,
        tglx@...utronix.de
Subject: [PATCH AUTOSEL 5.15 17/29] irqchip/nvic: Release nvic_base upon failure

From: "Souptick Joarder (HPE)" <jrdr.linux@...il.com>

[ Upstream commit e414c25e3399b2b3d7337dc47abccab5c71b7c8f ]

smatch warning was reported as below ->

smatch warnings:
drivers/irqchip/irq-nvic.c:131 nvic_of_init()
warn: 'nvic_base' not released on lines: 97.

Release nvic_base upon failure.

Reported-by: kernel test robot <lkp@...el.com>
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Souptick Joarder (HPE) <jrdr.linux@...il.com>
Signed-off-by: Marc Zyngier <maz@...nel.org>
Link: https://lore.kernel.org/r/20220218163303.33344-1-jrdr.linux@gmail.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/irqchip/irq-nvic.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/irqchip/irq-nvic.c b/drivers/irqchip/irq-nvic.c
index 599bb6fc5f0a..47b3b165479e 100644
--- a/drivers/irqchip/irq-nvic.c
+++ b/drivers/irqchip/irq-nvic.c
@@ -92,6 +92,7 @@ static int __init nvic_of_init(struct device_node *node,
 
 	if (!nvic_irq_domain) {
 		pr_warn("Failed to allocate irq domain\n");
+		iounmap(nvic_base);
 		return -ENOMEM;
 	}
 
@@ -101,6 +102,7 @@ static int __init nvic_of_init(struct device_node *node,
 	if (ret) {
 		pr_warn("Failed to allocate irq chips\n");
 		irq_domain_remove(nvic_irq_domain);
+		iounmap(nvic_base);
 		return ret;
 	}
 
-- 
2.34.1