8 files changed, 42 insertions, 51 deletions

diff --git a/drivers/isdn/Kconfig b/drivers/isdn/Kconfig
index 86cd75a0e84d..ef661acdda17 100644
--- a/drivers/isdn/Kconfig
+++ b/drivers/isdn/Kconfig
@@ -22,6 +22,7 @@ if ISDN
 
 menuconfig ISDN_I4L
         tristate "Old ISDN4Linux (deprecated)"
+        depends on TTY
         ---help---
           This driver allows you to use an ISDN adapter for networking
           connections and as dialin/out device.  The isdn-tty's have a built
diff --git a/drivers/isdn/capi/Kconfig b/drivers/isdn/capi/Kconfig
index 15c3ffd9d860..f04686580040 100644
--- a/drivers/isdn/capi/Kconfig
+++ b/drivers/isdn/capi/Kconfig
@@ -18,6 +18,7 @@ config CAPI_TRACE
 
 config ISDN_CAPI_MIDDLEWARE
         bool "CAPI2.0 Middleware support"
+        depends on TTY
         help
           This option will enhance the capabilities of the /dev/capi20
           interface.  It will provide a means of moving a data connection,
diff --git a/drivers/isdn/gigaset/Kconfig b/drivers/isdn/gigaset/Kconfig
index b18a92c32184..dde5e09e6267 100644
--- a/drivers/isdn/gigaset/Kconfig
+++ b/drivers/isdn/gigaset/Kconfig
@@ -1,5 +1,6 @@
 menuconfig ISDN_DRV_GIGASET
         tristate "Siemens Gigaset support"
+        depends on TTY
         select CRC_CCITT
         select BITREVERSE
         help
diff --git a/drivers/isdn/gigaset/interface.c b/drivers/isdn/gigaset/interface.c
index 20b7e7a1190f..e2b539675b66 100644
--- a/drivers/isdn/gigaset/interface.c
+++ b/drivers/isdn/gigaset/interface.c
@@ -134,7 +134,7 @@ static int if_open(struct tty_struct *tty, struct file *filp)
 
         if (cs->port.count == 1) {
                 tty_port_tty_set(&cs->port, tty);
-                tty->low_latency = 1;
+                cs->port.low_latency = 1;
         }
 
         mutex_unlock(&cs->mutex);
@@ -546,16 +546,8 @@ void gigaset_if_free(struct cardstate *cs)
 void gigaset_if_receive(struct cardstate *cs,
                         unsigned char *buffer, size_t len)
 {
-        struct tty_struct *tty = tty_port_tty_get(&cs->port);
-
-        if (tty == NULL) {
-                gig_dbg(DEBUG_IF, "receive on closed device");
-                return;
-        }
-
-        tty_insert_flip_string(tty, buffer, len);
-        tty_flip_buffer_push(tty);
-        tty_kref_put(tty);
+        tty_insert_flip_string(&cs->port, buffer, len);
+        tty_flip_buffer_push(&cs->port);
 }
 EXPORT_SYMBOL_GPL(gigaset_if_receive);
 
diff --git a/drivers/isdn/hardware/mISDN/Kconfig b/drivers/isdn/hardware/mISDN/Kconfig
index eadc1cd34a20..b8611e3e5e74 100644
--- a/drivers/isdn/hardware/mISDN/Kconfig
+++ b/drivers/isdn/hardware/mISDN/Kconfig
@@ -76,6 +76,7 @@ config MISDN_NETJET
         tristate "Support for NETJet cards"
         depends on MISDN
         depends on PCI
+        depends on TTY
         select MISDN_IPAC
         select ISDN_HDLC
         select ISDN_I4L
diff --git a/drivers/isdn/i4l/isdn_common.c b/drivers/isdn/i4l/isdn_common.c
index e2a945ee9f05..b87d9e577be2 100644
--- a/drivers/isdn/i4l/isdn_common.c
+++ b/drivers/isdn/i4l/isdn_common.c
@@ -876,7 +876,7 @@ isdn_readbchan(int di, int channel, u_char *buf, u_char *fp, int len, wait_queue
  * of the mapping (di,ch)<->minor, happen during the sleep? --he
  */
 int
-isdn_readbchan_tty(int di, int channel, struct tty_struct *tty, int cisco_hack)
+isdn_readbchan_tty(int di, int channel, struct tty_port *port, int cisco_hack)
 {
         int count;
         int count_pull;
@@ -891,7 +891,7 @@ isdn_readbchan_tty(int di, int channel, struct tty_struct *tty, int cisco_hack)
         if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
                 return 0;
 
-        len = tty_buffer_request_room(tty, dev->drv[di]->rcvcount[channel]);
+        len = tty_buffer_request_room(port, dev->drv[di]->rcvcount[channel]);
         if (len == 0)
                 return len;
 
@@ -912,7 +912,7 @@ isdn_readbchan_tty(int di, int channel, struct tty_struct *tty, int cisco_hack)
                         while ((count_pull < skb->len) && (len > 0)) {
                                 /* push every character but the last to the tty buffer directly */
                                 if (count_put)
-                                        tty_insert_flip_char(tty, last, TTY_NORMAL);
+                                        tty_insert_flip_char(port, last, TTY_NORMAL);
                                 len--;
                                 if (dev->drv[di]->DLEflag & DLEmask) {
                                         last = DLE;
@@ -940,7 +940,7 @@ isdn_readbchan_tty(int di, int channel, struct tty_struct *tty, int cisco_hack)
                         }
                         count_put = count_pull;
                         if (count_put > 1)
-                                tty_insert_flip_string(tty, skb->data, count_put - 1);
+                                tty_insert_flip_string(port, skb->data, count_put - 1);
                         last = skb->data[count_put - 1];
                         len -= count_put;
 #ifdef CONFIG_ISDN_AUDIO
@@ -952,16 +952,16 @@ isdn_readbchan_tty(int di, int channel, struct tty_struct *tty, int cisco_hack)
                          * Now we can dequeue it.
                          */
                         if (cisco_hack)
-                                tty_insert_flip_char(tty, last, 0xFF);
+                                tty_insert_flip_char(port, last, 0xFF);
                         else
-                                tty_insert_flip_char(tty, last, TTY_NORMAL);
+                                tty_insert_flip_char(port, last, TTY_NORMAL);
 #ifdef CONFIG_ISDN_AUDIO
                         ISDN_AUDIO_SKB_LOCK(skb) = 0;
 #endif
                         skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
                         dev_kfree_skb(skb);
                 } else {
-                        tty_insert_flip_char(tty, last, TTY_NORMAL);
+                        tty_insert_flip_char(port, last, TTY_NORMAL);
                         /* Not yet emptied this buff, so it
                          * must stay in the queue, for further calls
                          * but we pull off the data we got until now.
diff --git a/drivers/isdn/i4l/isdn_common.h b/drivers/isdn/i4l/isdn_common.h
index 9a471f62e1d4..2260ef07ab9c 100644
--- a/drivers/isdn/i4l/isdn_common.h
+++ b/drivers/isdn/i4l/isdn_common.h
@@ -37,7 +37,7 @@ extern void isdn_timer_ctrl(int tf, int onoff);
 extern void isdn_unexclusive_channel(int di, int ch);
 extern int isdn_getnum(char **);
 extern int isdn_readbchan(int, int, u_char *, u_char *, int, wait_queue_head_t *);
-extern int isdn_readbchan_tty(int, int, struct tty_struct *, int);
+extern int isdn_readbchan_tty(int, int, struct tty_port *, int);
 extern int isdn_get_free_channel(int, int, int, int, int, char *);
 extern int isdn_writebuf_skb_stub(int, int, int, struct sk_buff *);
 extern int register_isdn(isdn_if *i);
diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
index e09dc8a5e743..d8a7d8323414 100644
--- a/drivers/isdn/i4l/isdn_tty.c
+++ b/drivers/isdn/i4l/isdn_tty.c
@@ -60,18 +60,14 @@ static int si2bit[8] =
 static int
 isdn_tty_try_read(modem_info *info, struct sk_buff *skb)
 {
+        struct tty_port *port = &info->port;
         int c;
         int len;
-        struct tty_struct *tty;
         char last;
 
         if (!info->online)
                 return 0;
 
-        tty = info->port.tty;
-        if (!tty)
-                return 0;
-
         if (!(info->mcr & UART_MCR_RTS))
                 return 0;
 
@@ -81,7 +77,7 @@ isdn_tty_try_read(modem_info *info, struct sk_buff *skb)
 #endif
                 ;
 
-        c = tty_buffer_request_room(tty, len);
+        c = tty_buffer_request_room(port, len);
         if (c < len)
                 return 0;
 
@@ -91,25 +87,25 @@ isdn_tty_try_read(modem_info *info, struct sk_buff *skb)
                 unsigned char *dp = skb->data;
                 while (--l) {
                         if (*dp == DLE)
-                                tty_insert_flip_char(tty, DLE, 0);
-                        tty_insert_flip_char(tty, *dp++, 0);
+                                tty_insert_flip_char(port, DLE, 0);
+                        tty_insert_flip_char(port, *dp++, 0);
                 }
                 if (*dp == DLE)
-                        tty_insert_flip_char(tty, DLE, 0);
+                        tty_insert_flip_char(port, DLE, 0);
                 last = *dp;
         } else {
 #endif
                 if (len > 1)
-                        tty_insert_flip_string(tty, skb->data, len - 1);
+                        tty_insert_flip_string(port, skb->data, len - 1);
                 last = skb->data[len - 1];
 #ifdef CONFIG_ISDN_AUDIO
         }
 #endif
         if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
-                tty_insert_flip_char(tty, last, 0xFF);
+                tty_insert_flip_char(port, last, 0xFF);
         else
-                tty_insert_flip_char(tty, last, TTY_NORMAL);
-        tty_flip_buffer_push(tty);
+                tty_insert_flip_char(port, last, TTY_NORMAL);
+        tty_flip_buffer_push(port);
         kfree_skb(skb);
 
         return 1;
@@ -126,7 +122,6 @@ isdn_tty_readmodem(void)
         int midx;
         int i;
         int r;
-        struct tty_struct *tty;
         modem_info *info;
 
         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
@@ -144,20 +139,21 @@ isdn_tty_readmodem(void)
                 if ((info->vonline & 1) && (info->emu.vpar[1]))
                         isdn_audio_eval_silence(info);
 #endif
-                tty = info->port.tty;
-                if (tty) {
-                        if (info->mcr & UART_MCR_RTS) {
-                                /* CISCO AsyncPPP Hack */
-                                if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
-                                        r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0);
-                                else
-                                        r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1);
-                                if (r)
-                                        tty_flip_buffer_push(tty);
-                        } else
-                                r = 1;
+                if (info->mcr & UART_MCR_RTS) {
+                        /* CISCO AsyncPPP Hack */
+                        if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
+                                r = isdn_readbchan_tty(info->isdn_driver,
+                                                info->isdn_channel,
+                                                &info->port, 0);
+                        else
+                                r = isdn_readbchan_tty(info->isdn_driver,
+                                                info->isdn_channel,
+                                                &info->port, 1);
+                        if (r)
+                                tty_flip_buffer_push(&info->port);
                 } else
                         r = 1;
+
                 if (r) {
                         info->rcvsched = 0;
                         resched = 1;
@@ -2229,7 +2225,7 @@ isdn_tty_stat_callback(int i, isdn_ctrl *c)
 void
 isdn_tty_at_cout(char *msg, modem_info *info)
 {
-        struct tty_struct *tty;
+        struct tty_port *port = &info->port;
         atemu *m = &info->emu;
         char *p;
         char c;
@@ -2246,15 +2242,14 @@ isdn_tty_at_cout(char *msg, modem_info *info)
         l = strlen(msg);
 
         spin_lock_irqsave(&info->readlock, flags);
-        tty = info->port.tty;
-        if ((info->port.flags & ASYNC_CLOSING) || (!tty)) {
+        if (port->flags & ASYNC_CLOSING) {
                 spin_unlock_irqrestore(&info->readlock, flags);
                 return;
         }
 
         /* use queue instead of direct, if online and */
         /* data is in queue or buffer is full */
-        if (info->online && ((tty_buffer_request_room(tty, l) < l) ||
+        if (info->online && ((tty_buffer_request_room(port, l) < l) ||
                              !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
                 skb = alloc_skb(l, GFP_ATOMIC);
                 if (!skb) {
@@ -2285,7 +2280,7 @@ isdn_tty_at_cout(char *msg, modem_info *info)
                 if (skb) {
                         *sp++ = c;
                 } else {
-                        if (tty_insert_flip_char(tty, c, TTY_NORMAL) == 0)
+                        if (tty_insert_flip_char(port, c, TTY_NORMAL) == 0)
                                 break;
                 }
         }
@@ -2299,7 +2294,7 @@ isdn_tty_at_cout(char *msg, modem_info *info)
 
         } else {
                 spin_unlock_irqrestore(&info->readlock, flags);
-                tty_flip_buffer_push(tty);
+                tty_flip_buffer_push(port);
         }
 }