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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>
This commit is contained in:
Amit Shah 2010-09-02 18:11:48 +05:30 committed by Rusty Russell
parent 7a2853178d
commit 8ad37e83c8
1 changed files with 9 additions and 3 deletions
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12
drivers/char/virtio_console.c
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@ -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;
}
/*