From: Yuan Can <yuancan@huawei.com>
Date: Wed, 23 Nov 2022 06:12:12 +0000 (+0000)
Subject: serial: sunsab: Fix error handling in sunsab_init()
X-Git-Tag: v5.15.92~1003
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=07d547d74244d0283ac2c46469ce90637750eae0;p=platform%2Fkernel%2Flinux-rpi.git

serial: sunsab: Fix error handling in sunsab_init()

[ Upstream commit 1a6ec673fb627c26e2267ca0a03849f91dbd9b40 ]

The sunsab_init() returns the platform_driver_register() directly without
checking its return value, if platform_driver_register() failed, the
allocated sunsab_ports is leaked.
Fix by free sunsab_ports and set it to NULL when platform_driver_register()
failed.

Fixes: c4d37215a824 ("[SERIAL] sunsab: Convert to of_driver framework.")
Signed-off-by: Yuan Can <yuancan@huawei.com>
Link: https://lore.kernel.org/r/20221123061212.52593-1-yuancan@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/tty/serial/sunsab.c b/drivers/tty/serial/sunsab.c
index 92e5726..ac7cb80 100644
--- a/drivers/tty/serial/sunsab.c
+++ b/drivers/tty/serial/sunsab.c
@@ -1137,7 +1137,13 @@ static int __init sunsab_init(void)
 		}
 	}
 
-	return platform_driver_register(&sab_driver);
+	err = platform_driver_register(&sab_driver);
+	if (err) {
+		kfree(sunsab_ports);
+		sunsab_ports = NULL;
+	}
+
+	return err;
 }
 
 static void __exit sunsab_exit(void)