mISDN: Added an ioctl to change the device name

To get persistent device names with hotplug we need to rename devices
sometime.

Signed-off-by: Matthias Urlichs <matthias@urlichs.de>
Signed-off-by: Karsten Keil <kkeil@suse.de>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c
index 37a2de18cfd..98fa6c4a4bd 100644
--- a/drivers/isdn/mISDN/socket.c
+++ b/drivers/isdn/mISDN/socket.c
@@ -645,6 +645,21 @@ base_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                 } else
                         err = -ENODEV;
                 break;
+        case IMSETDEVNAME:
+                {
+                        struct mISDN_devrename dn;
+                        if (copy_from_user(&dn, (void __user *)arg,
+                            sizeof(dn))) {
+                                err = -EFAULT;
+                                break;
+                        }
+                        dev = get_mdevice(dn.id);
+                        if (dev)
+                                strlcpy(dev->name, dn.name, MISDN_MAX_IDLEN);
+                        else
+                                err = -ENODEV;
+                }
+                break;
         default:
                 err = -EINVAL;
         }