[Patch] cris: fix a build error in sync_serial_open()

[AmÃrico Wang]

This patch fixes such a build error on cris:

arch/cris/arch-v10/drivers/sync_serial.c:628: error: 'ret' undeclared
(first use in this function)

'ret' should be 'err'.

Reported-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Signed-off-by: WANG Cong <xiyou.wangcong@xxxxxxxxx>
Cc: Mikael Starvik <starvik@xxxxxxxx>
Cc: Jesper Nilsson <jesper.nilsson@xxxxxxxx>
---
diff --git a/arch/cris/arch-v10/drivers/sync_serial.c b/arch/cris/arch-v10/drivers/sync_serial.c
index 85026537..d2ad9e7 100644
--- a/arch/cris/arch-v10/drivers/sync_serial.c
+++ b/arch/cris/arch-v10/drivers/sync_serial.c
@@ -625,11 +625,11 @@ static int sync_serial_open(struct inode *inode, struct file *file)
 			*R_IRQ_MASK1_SET = 1 << port->data_avail_bit;
 		DEBUG(printk(KERN_DEBUG "sser%d rec started\n", dev));
 	}
-	ret = 0;
+	err = 0;
 	
 out:
 	mutex_unlock(&sync_serial_mutex);
-	return ret;
+	return err;
 }
 
 static int sync_serial_release(struct inode *inode, struct file *file)