diff options
| -rw-r--r-- | drivers/tty/metag_da.c | 31 |
1 files changed, 14 insertions, 17 deletions
diff --git a/drivers/tty/metag_da.c b/drivers/tty/metag_da.c index fc2a36b..0e888621 100644 --- a/drivers/tty/metag_da.c +++ b/drivers/tty/metag_da.c @@ -147,9 +147,8 @@ static int chancall(int in_bios_function, int in_channel, /* * Attempts to fetch count bytes from channel and returns actual count. */ -static int fetch_data(struct tty_struct *tty) +static int fetch_data(unsigned int channel) { - unsigned int channel = tty->index; struct dashtty_port *dport = &dashtty_ports[channel]; int received = 0; @@ -180,31 +179,31 @@ unlock: } /** - * find_channel_to_poll() - Returns kref to the next channel tty to poll. - * Returns: The TTY of the next channel to poll, or NULL if no TTY needs - * polling. Release with tty_kref_put(). + * find_channel_to_poll() - Returns number of the next channel to poll. + * Returns: The number of the next channel to poll, or -1 if none need + * polling. */ -static struct tty_struct *find_channel_to_poll(void) +static int find_channel_to_poll(void) { static int last_polled_channel; int last = last_polled_channel; int chan; - struct tty_struct *tty = NULL; + struct dashtty_port *dport; for (chan = last + 1; ; ++chan) { if (chan >= NUM_TTY_CHANNELS) chan = 0; - tty = tty_port_tty_get(&dashtty_ports[chan].port); - if (tty) { + dport = &dashtty_ports[chan]; + if (dport->rx_buf) { last_polled_channel = chan; - return tty; + return chan; } if (chan == last) break; } - return tty; + return -1; } /** @@ -302,19 +301,17 @@ static int put_data(void *arg) */ static void dashtty_timer(unsigned long ignored) { - struct tty_struct *tty; + int channel; /* If there are no ports open do nothing and don't poll again. */ if (!atomic_read(&num_channels_need_poll)) return; - tty = find_channel_to_poll(); + channel = find_channel_to_poll(); /* Did we find a channel to poll? */ - if (tty) { - fetch_data(tty); - tty_kref_put(tty); - } + if (channel >= 0) + fetch_data(channel); mod_timer_pinned(&poll_timer, jiffies + DA_TTY_POLL); } |
