virtio: console: open: Use a common path for error handling

Just re-arrange code for future patches.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 21b6213..2f4f0b2 100644 (file)
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -711,6 +711,7 @@ static int port_fops_open(struct inode *inode, struct file *filp)
 {
        struct cdev *cdev = inode->i_cdev;
        struct port *port;
+       int ret;
 
        port = container_of(cdev, struct port, cdev);
        filp->private_data = port;
@@ -719,14 +720,17 @@ static int port_fops_open(struct inode *inode, struct file *filp)
         * Don't allow opening of console port devices -- that's done
         * via /dev/hvc
         */
-       if (is_console_port(port))
-               return -ENXIO;
+       if (is_console_port(port)) {
+               ret = -ENXIO;
+               goto out;
+       }
 
        /* Allow only one process to open a particular port at a time */
        spin_lock_irq(&port->inbuf_lock);
        if (port->guest_connected) {
                spin_unlock_irq(&port->inbuf_lock);
-               return -EMFILE;
+               ret = -EMFILE;
+               goto out;
        }
 
        port->guest_connected = true;
@@ -745,6 +749,8 @@ static int port_fops_open(struct inode *inode, struct file *filp)
        send_control_msg(filp->private_data, VIRTIO_CONSOLE_PORT_OPEN, 1);
 
        return 0;
+out:
+       return ret;
 }
 
 /*