[PATCH] TTY layer buffering revamp

[powerpc.git] / drivers / net / hamradio / mkiss.c

diff --git a/drivers/net/hamradio/mkiss.c b/drivers/net/hamradio/mkiss.c
index 85d6dc0..dc5e9d5 100644 (file)
--- a/drivers/net/hamradio/mkiss.c
+++ b/drivers/net/hamradio/mkiss.c
@@ -390,10 +390,8 @@ static void ax_changedmtu(struct mkiss *ax)
                       "MTU change cancelled.\n",
                       ax->dev->name);
                dev->mtu = ax->mtu;
-               if (xbuff != NULL)
-                       kfree(xbuff);
-               if (rbuff != NULL)
-                       kfree(rbuff);
+               kfree(xbuff);
+               kfree(rbuff);
                return;
        }
 
@@ -517,6 +515,7 @@ static void ax_encaps(struct net_device *dev, unsigned char *icp, int len)
                        count = kiss_esc(p, (unsigned char *)ax->xbuff, len);
                }
        }
+       spin_unlock_bh(&ax->buflock);
 
        set_bit(TTY_DO_WRITE_WAKEUP, &ax->tty->flags);
        actual = ax->tty->driver->write(ax->tty, ax->xbuff, count);
@@ -754,6 +753,7 @@ static int mkiss_open(struct tty_struct *tty)
 
        ax->tty = tty;
        tty->disc_data = ax;
+       tty->receive_room = 65535;
 
        if (tty->driver->flush_buffer)
                tty->driver->flush_buffer(tty);
@@ -941,11 +941,6 @@ static void mkiss_receive_buf(struct tty_struct *tty, const unsigned char *cp,
                tty->driver->unthrottle(tty);
 }
 
-static int mkiss_receive_room(struct tty_struct *tty)
-{
-       return 65536;  /* We can handle an infinite amount of data. :-) */
-}
-
 /*
  * Called by the driver when there's room for more data.  If we have
  * more packets to send, we send them here.
@@ -984,7 +979,6 @@ static struct tty_ldisc ax_ldisc = {
        .close          = mkiss_close,
        .ioctl          = mkiss_ioctl,
        .receive_buf    = mkiss_receive_buf,
-       .receive_room   = mkiss_receive_room,
        .write_wakeup   = mkiss_write_wakeup
 };