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TTY: switch tty_buffer_request_room to tty_port

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Now, we start converting tty buffer functions to actually use
tty_port. This will allow us to get rid of the need of tty pointer in
many call sites. Only tty_port will be needed and hence no more
tty_port_tty_get calls in those paths.

Here we start with tty_buffer_request_room.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby
2013-01-03 15:53:01 +01:00
committed by Greg Kroah-Hartman
parent ea28fd56fc
commit 227434f898
21 changed files with 60 additions and 43 deletions
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12
drivers/isdn/i4l/isdn_tty.c
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@@ -60,6 +60,7 @@ 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;
@@ -68,7 +69,7 @@ isdn_tty_try_read(modem_info *info, struct sk_buff *skb)
if (!info->online)
return 0;
tty = info->port.tty;
tty = port->tty;
if (!tty)
return 0;
@@ -81,7 +82,7 @@ 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;
@@ -2230,6 +2231,7 @@ 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 +2248,15 @@ 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)) {
tty = port->tty;
if ((port->flags & ASYNC_CLOSING) || (!tty)) {
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) {