mISDN: Added layer-1-hold feature

Add IMHOLD_L1 ioctl.
The feature will be disabled on closing.

Signed-off-by: Andreas Eversberg <andreas@eversberg.eu>
Signed-off-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 18 insertions, 3 deletions

diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c
index 508945d1b9c1..530f68977361 100644
--- a/drivers/isdn/mISDN/socket.c
+++ b/drivers/isdn/mISDN/socket.c
@@ -292,7 +292,7 @@ static int
 data_sock_ioctl_bound(struct sock *sk, unsigned int cmd, void __user *p)
 {
         struct mISDN_ctrl_req   cq;
-        int                     err = -EINVAL, val;
+        int                     err = -EINVAL, val[2];
         struct mISDNchannel     *bchan, *next;
 
         lock_sock(sk);
@@ -328,12 +328,27 @@ data_sock_ioctl_bound(struct sock *sk, unsigned int cmd, void __user *p)
                         err = -EINVAL;
                         break;
                 }
-                if (get_user(val, (int __user *)p)) {
+                val[0] = cmd;
+                if (get_user(val[1], (int __user *)p)) {
                         err = -EFAULT;
                         break;
                 }
                 err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
-                    CONTROL_CHANNEL, &val);
+                    CONTROL_CHANNEL, val);
+                break;
+        case IMHOLD_L1:
+                if (sk->sk_protocol != ISDN_P_LAPD_NT
+                 && sk->sk_protocol != ISDN_P_LAPD_TE) {
+                        err = -EINVAL;
+                        break;
+                }
+                val[0] = cmd;
+                if (get_user(val[1], (int __user *)p)) {
+                        err = -EFAULT;
+                        break;
+                }
+                err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
+                    CONTROL_CHANNEL, val);
                 break;
         default:
                 err = -EINVAL;