linux-kernel - [PATCH 4.19 165/421] tty: nozomi: Fix a resource leak in an error handling function

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Date:   Mon, 19 Jul 2021 16:49:36 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jiri Slaby <jirislaby@...nel.org>,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 165/421] tty: nozomi: Fix a resource leak in an error handling function

From: Christophe JAILLET <christophe.jaillet@...adoo.fr>

[ Upstream commit 31a9a318255960d32ae183e95d0999daf2418608 ]

A 'request_irq()' call is not balanced by a corresponding 'free_irq()' in
the error handling path, as already done in the remove function.

Add it.

Fixes: 9842c38e9176 ("kfifo: fix warn_unused_result")
Reviewed-by: Jiri Slaby <jirislaby@...nel.org>
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Link: https://lore.kernel.org/r/4f0d2b3038e82f081d370ccb0cade3ad88463fe7.1620580838.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/tty/nozomi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c
index fed820e9ab9d..8dde9412a1aa 100644
--- a/drivers/tty/nozomi.c
+++ b/drivers/tty/nozomi.c
@@ -1445,6 +1445,7 @@ err_free_tty:
 		tty_unregister_device(ntty_driver, dc->index_start + i);
 		tty_port_destroy(&dc->port[i].port);
 	}
+	free_irq(pdev->irq, dc);
 err_free_kfifo:
 	for (i = 0; i < MAX_PORT; i++)
 		kfifo_free(&dc->port[i].fifo_ul);
-- 
2.30.2