linux-kernel - [PATCH] tty: goldfish: Use tty_port

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Date:   Mon, 28 Mar 2022 19:58:44 +0800
From:   Wang Weiyang <wangweiyang2@...wei.com>
To:     <gregkh@...uxfoundation.org>, <jirislaby@...nel.org>,
        <sheng@...ux.intel.com>, <bruce.j.beare@...el.com>,
        <xiaohui.xin@...el.com>, <yunhong.jiang@...el.com>,
        <arve@...gle.com>
CC:     <linux-kernel@...r.kernel.org>, <wangweiyang2@...wei.com>
Subject: [PATCH] tty: goldfish: Use tty_port_destroy() to destroy port

In goldfish_tty_probe(), the port initialized through tty_port_init()
should be destroyed in error paths.In goldfish_tty_remove(), qtty->port
also should be destroyed or else might leak resources.

Fix the above by calling tty_port_destroy().

Fixes: 666b7793d4bf ("goldfish: tty driver")
Signed-off-by: Wang Weiyang <wangweiyang2@...wei.com>
---
 drivers/tty/goldfish.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/tty/goldfish.c b/drivers/tty/goldfish.c
index ad13532e92fe..9e1168c39e77 100644
--- a/drivers/tty/goldfish.c
+++ b/drivers/tty/goldfish.c
@@ -405,6 +405,7 @@ static int goldfish_tty_probe(struct platform_device *pdev)
 err_tty_register_device_failed:
 	free_irq(irq, qtty);
 err_dec_line_count:
+	tty_port_destroy(&qtty->port);
 	goldfish_tty_current_line_count--;
 	if (goldfish_tty_current_line_count == 0)
 		goldfish_tty_delete_driver();
@@ -426,6 +427,7 @@ static int goldfish_tty_remove(struct platform_device *pdev)
 	iounmap(qtty->base);
 	qtty->base = NULL;
 	free_irq(qtty->irq, pdev);
+	tty_port_destroy(&qtty->port);
 	goldfish_tty_current_line_count--;
 	if (goldfish_tty_current_line_count == 0)
 		goldfish_tty_delete_driver();
-- 
2.17.1