tty: mpsc.c: move assignment out of if () block

We should not be doing assignments within an if () block
so fix up the code to not do this.

change was created using Coccinelle.

CC: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/mpsc.c

@@ -913,7 +913,8 @@ static int mpsc_make_ready(struct mpsc_port_info *pi)
 
 	if (!pi->ready) {
 		mpsc_init_hw(pi);
-		if ((rc = mpsc_alloc_ring_mem(pi)))
+		rc = mpsc_alloc_ring_mem(pi);
+		if (rc)
 			return rc;
 		mpsc_init_rings(pi);
 		pi->ready = 1;
@@ -1895,7 +1896,8 @@ static int mpsc_shared_drv_probe(struct platform_device *dev)
 	int				 rc = -ENODEV;
 
 	if (dev->id == 0) {
-		if (!(rc = mpsc_shared_map_regs(dev))) {
+		rc = mpsc_shared_map_regs(dev);
+		if (!rc) {
 			pdata = (struct mpsc_shared_pdata *)
 				dev_get_platdata(&dev->dev);
 
@@ -2081,14 +2083,16 @@ static int mpsc_drv_probe(struct platform_device *dev)
 	if (dev->id < MPSC_NUM_CTLRS) {
 		pi = &mpsc_ports[dev->id];
 
-		if (!(rc = mpsc_drv_map_regs(pi, dev))) {
+		rc = mpsc_drv_map_regs(pi, dev);
+		if (!rc) {
 			mpsc_drv_get_platform_data(pi, dev, dev->id);
 			pi->port.dev = &dev->dev;
 
-			if (!(rc = mpsc_make_ready(pi))) {
+			rc = mpsc_make_ready(pi);
+			if (!rc) {
 				spin_lock_init(&pi->tx_lock);
-				if (!(rc = uart_add_one_port(&mpsc_reg,
-								&pi->port))) {
+				rc = uart_add_one_port(&mpsc_reg, &pi->port);
+				if (!rc) {
 					rc = 0;
 				} else {
 					mpsc_release_port((struct uart_port *)
@@ -2136,9 +2140,12 @@ static int __init mpsc_drv_init(void)
 	memset(mpsc_ports, 0, sizeof(mpsc_ports));
 	memset(&mpsc_shared_regs, 0, sizeof(mpsc_shared_regs));
 
-	if (!(rc = uart_register_driver(&mpsc_reg))) {
-		if (!(rc = platform_driver_register(&mpsc_shared_driver))) {
-			if ((rc = platform_driver_register(&mpsc_driver))) {
+	rc = uart_register_driver(&mpsc_reg);
+	if (!rc) {
+		rc = platform_driver_register(&mpsc_shared_driver);
+		if (!rc) {
+			rc = platform_driver_register(&mpsc_driver);
+			if (rc) {
 				platform_driver_unregister(&mpsc_shared_driver);
 				uart_unregister_driver(&mpsc_reg);
 			}