isdn: switch to int put_char method

Signed-off-by: Alan Cox <alan@redhat.com>
Acked-by: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c
index 24c6b7ca62be..6ca0bb949ad3 100644
--- a/drivers/isdn/capi/capi.c
+++ b/drivers/isdn/capi/capi.c
@@ -1111,11 +1111,12 @@ static int capinc_tty_write(struct tty_struct * tty,
         return count;
 }
 
-static void capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
+static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
 {
         struct capiminor *mp = (struct capiminor *)tty->driver_data;
         struct sk_buff *skb;
         unsigned long flags;
+        int ret = 1;
 
 #ifdef _DEBUG_TTYFUNCS
         printk(KERN_DEBUG "capinc_put_char(%u)\n", ch);
@@ -1125,7 +1126,7 @@ static void capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
 #ifdef _DEBUG_TTYFUNCS
                 printk(KERN_DEBUG "capinc_tty_put_char: mp or mp->ncci NULL\n");
 #endif
-                return;
+                return 0;
         }
 
         spin_lock_irqsave(&workaround_lock, flags);
@@ -1134,7 +1135,7 @@ static void capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
                 if (skb_tailroom(skb) > 0) {
                         *(skb_put(skb, 1)) = ch;
                         spin_unlock_irqrestore(&workaround_lock, flags);
-                        return;
+                        return 1;
                 }
                 mp->ttyskb = NULL;
                 skb_queue_tail(&mp->outqueue, skb);
@@ -1148,8 +1149,10 @@ static void capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
                 mp->ttyskb = skb;
         } else {
                 printk(KERN_ERR "capinc_put_char: char %u lost\n", ch);
+                ret = 0;
         }
         spin_unlock_irqrestore(&workaround_lock, flags);
+        return ret;
 }
 
 static void capinc_tty_flush_chars(struct tty_struct *tty)