Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / drivers / s390 / net / ctctty.c

diff --git a/drivers/s390/net/ctctty.c b/drivers/s390/net/ctctty.c
index 3080393..af54d1d 100644 (file)
--- a/drivers/s390/net/ctctty.c
+++ b/drivers/s390/net/ctctty.c
@@ -1,6 +1,4 @@
 /*
- * $Id: ctctty.c,v 1.29 2005/04/05 08:50:44 mschwide Exp $
- *
  * CTC / ESCON network driver, tty interface.
  *
  * Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
@@ -25,6 +23,7 @@
 #include <linux/config.h>
 #include <linux/module.h>
 #include <linux/tty.h>
+#include <linux/tty_flip.h>
 #include <linux/serial_reg.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
@@ -101,25 +100,17 @@ static spinlock_t ctc_tty_lock;
 static int
 ctc_tty_try_read(ctc_tty_info * info, struct sk_buff *skb)
 {
-       int c;
        int len;
        struct tty_struct *tty;
 
        DBF_TEXT(trace, 5, __FUNCTION__);
        if ((tty = info->tty)) {
                if (info->mcr & UART_MCR_RTS) {
-                       c = TTY_FLIPBUF_SIZE - tty->flip.count;
                        len = skb->len;
-                       if (c >= len) {
-                               memcpy(tty->flip.char_buf_ptr, skb->data, len);
-                               memset(tty->flip.flag_buf_ptr, 0, len);
-                               tty->flip.count += len;
-                               tty->flip.char_buf_ptr += len;
-                               tty->flip.flag_buf_ptr += len;
-                               tty_flip_buffer_push(tty);
-                               kfree_skb(skb);
-                               return 1;
-                       }
+                       tty_insert_flip_string(tty, skb->data, len);
+                       tty_flip_buffer_push(tty);
+                       kfree_skb(skb);
+                       return 1;
                }
        }
        return 0;
@@ -138,25 +129,18 @@ ctc_tty_readmodem(ctc_tty_info *info)
        DBF_TEXT(trace, 5, __FUNCTION__);
        if ((tty = info->tty)) {
                if (info->mcr & UART_MCR_RTS) {
-                       int c = TTY_FLIPBUF_SIZE - tty->flip.count;
                        struct sk_buff *skb;
-                       
-                       if ((c > 0) && (skb = skb_dequeue(&info->rx_queue))) {
+
+                       if ((skb = skb_dequeue(&info->rx_queue))) {
                                int len = skb->len;
-                               if (len > c)
-                                       len = c;
-                               memcpy(tty->flip.char_buf_ptr, skb->data, len);
+                               tty_insert_flip_string(tty, skb->data, len);
                                skb_pull(skb, len);
-                               memset(tty->flip.flag_buf_ptr, 0, len);
-                               tty->flip.count += len;
-                               tty->flip.char_buf_ptr += len;
-                               tty->flip.flag_buf_ptr += len;
                                tty_flip_buffer_push(tty);
                                if (skb->len > 0)
                                        skb_queue_head(&info->rx_queue, skb);
                                else {
                                        kfree_skb(skb);
-                                       ret = skb_queue_len(&info->rx_queue);
+                                       ret = !skb_queue_empty(&info->rx_queue);
                                }
                        }
                }
@@ -344,7 +328,7 @@ ctc_tty_inject(ctc_tty_info *info, char c)
 {
        int skb_res;
        struct sk_buff *skb;
-       
+
        DBF_TEXT(trace, 4, __FUNCTION__);
        if (ctc_tty_shuttingdown)
                return;
@@ -513,7 +497,7 @@ ctc_tty_write(struct tty_struct *tty, const u_char * buf, int count)
                c = (count < CTC_TTY_XMIT_SIZE) ? count : CTC_TTY_XMIT_SIZE;
                if (c <= 0)
                        break;
-               
+
                skb_res = info->netdev->hard_header_len + sizeof(info->mcr) +
                        + sizeof(__u32);
                skb = dev_alloc_skb(skb_res + c);
@@ -530,7 +514,7 @@ ctc_tty_write(struct tty_struct *tty, const u_char * buf, int count)
                total += c;
                count -= c;
        }
-       if (skb_queue_len(&info->tx_queue)) {
+       if (!skb_queue_empty(&info->tx_queue)) {
                info->lsr &= ~UART_LSR_TEMT;
                tasklet_schedule(&info->tasklet);
        }
@@ -594,7 +578,7 @@ ctc_tty_flush_chars(struct tty_struct *tty)
                return;
        if (ctc_tty_paranoia_check(info, tty->name, "ctc_tty_flush_chars"))
                return;
-       if (tty->stopped || tty->hw_stopped || (!skb_queue_len(&info->tx_queue)))
+       if (tty->stopped || tty->hw_stopped || skb_queue_empty(&info->tx_queue))
                return;
        tasklet_schedule(&info->tasklet);
 }
@@ -844,7 +828,7 @@ ctc_tty_block_til_ready(struct tty_struct *tty, struct file *filp, ctc_tty_info
        if (tty_hung_up_p(filp) ||
            (info->flags & CTC_ASYNC_CLOSING)) {
                if (info->flags & CTC_ASYNC_CLOSING)
-                       wait_event(info->close_wait, 
+                       wait_event(info->close_wait,
                                   !(info->flags & CTC_ASYNC_CLOSING));
 #ifdef MODEM_DO_RESTART
                if (info->flags & CTC_ASYNC_HUP_NOTIFY)
@@ -1263,7 +1247,7 @@ ctc_tty_unregister_netdev(struct net_device *dev) {
 void
 ctc_tty_cleanup(void) {
        unsigned long saveflags;
-       
+
        DBF_TEXT(trace, 2, __FUNCTION__);
        spin_lock_irqsave(&ctc_tty_lock, saveflags);
        ctc_tty_shuttingdown = 1;