msm_serial: add missing iounmap() on error in msm_request_port()

Add the missing iounmap() before return from msm_request_port()
in the error handling case.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Reviewed-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c
index 2c6cfb3cf032..0b38b288ed5b 100644
--- a/drivers/tty/serial/msm_serial.c
+++ b/drivers/tty/serial/msm_serial.c
@@ -637,7 +637,7 @@ static int msm_request_port(struct uart_port *port)
                 if (!request_mem_region(gsbi_resource->start, size,
                                                  "msm_serial")) {
                         ret = -EBUSY;
-                        goto fail_release_port;
+                        goto fail_release_port_membase;
                 }
 
                 msm_port->gsbi_base = ioremap(gsbi_resource->start, size);
@@ -651,6 +651,8 @@ static int msm_request_port(struct uart_port *port)
 
 fail_release_gsbi:
         release_mem_region(gsbi_resource->start, size);
+fail_release_port_membase:
+        iounmap(port->membase);
 fail_release_port:
         release_mem_region(port->mapbase, size);
         return ret;