linux-kernel - [PATCH] driver: tty: add missing unregister in err case

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Message-ID: <51A568EC.2070103@huawei.com>
Date:	Wed, 29 May 2013 10:33:16 +0800
From:	Libo Chen <clbchenlibo.chen@...wei.com>
To:	<timur@...i.org>, Greg KH <gregkh@...uxfoundation.org>
CC:	<jslaby@...e.cz>, Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	<linux-serial@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>, Li Zefan <lizefan@...wei.com>
Subject: [PATCH] driver: tty: add missing unregister in err case


when platform_driver_register broken, we should unregister ucc_uart_driver

Signed-off-by: Libo chen <libo.chen@...wei.com>
---
 drivers/tty/serial/ucc_uart.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c
index 7355303..f86f447 100644
--- a/drivers/tty/serial/ucc_uart.c
+++ b/drivers/tty/serial/ucc_uart.c
@@ -1518,9 +1518,11 @@ static int __init ucc_uart_init(void)
 	}

 	ret = platform_driver_register(&ucc_uart_of_driver);
-	if (ret)
+	if (ret) {
 		printk(KERN_ERR
 		       "ucc-uart: could not register platform driver\n");
+		uart_unregister_driver(&ucc_uart_driver);
+	}

 	return ret;
 }
-- 
1.7.1


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