From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wei Yongjun Subject: [PATCH -next] serial: uartps: Fix missing unlock on error in cdns_get_id() Date: Tue, 25 Sep 2018 14:23:21 +0000 Message-ID: <1537885401-18605-1-git-send-email-weiyongjun1@huawei.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Greg Kroah-Hartman , Jiri Slaby , Michal Simek Cc: kernel-janitors@vger.kernel.org, Wei Yongjun , linux-arm-kernel@lists.infradead.org, linux-serial@vger.kernel.org List-Id: linux-serial@vger.kernel.org Add the missing unlock before return from function cdns_get_id() in the error handling case. Fixes: ae1cca3fa347 ("serial: uartps: Change uart ID port allocation") Signed-off-by: Wei Yongjun --- drivers/tty/serial/xilinx_uartps.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index f77200a..0e3dae4 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -1394,8 +1394,10 @@ static int cdns_get_id(struct platform_device *pdev) if (!alias_bitmap_initialized) { ret = of_alias_get_alias_list(cdns_uart_of_match, "serial", alias_bitmap, MAX_UART_INSTANCES); - if (ret) + if (ret) { + mutex_unlock(&bitmap_lock); return ret; + } alias_bitmap_initialized++; }