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authorAlan Cox <alan@lxorguk.ukuu.org.uk>2008-04-30 00:53:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-30 08:29:45 -0700
commit978e595f88a1fba5869aa42a4af4fba36f33ecac (patch)
tree60848f49949c5b7b518621ee36cdc6d500244539 /drivers/char/riscom8.c
parentac0e4b7d319bf284bb64bc7e1c051417386b34a4 (diff)
tty/serial: lay the foundations for the next set of reworks
- Stop drivers calling their own flush method indirectly, it obfuscates code and it will change soon anyway - A few more lock_kernel paths temporarily needed in some driver internal waiting code - Remove private put_char method that does a write call for one char - we have that anyway - Most but not yet all of the termios copy under lock fixing (some has other dependencies to follow) - Note a few locking bugs in drivers found in the process - Kill remaining [ab]users of TIOCG/SSOFTCAR in the driver, these must go to fix the termios locking Signed-off-by: Alan Cox <alan@redhat.com> Cc: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/riscom8.c')
-rw-r--r--drivers/char/riscom8.c38
1 files changed, 19 insertions, 19 deletions
diff --git a/drivers/char/riscom8.c b/drivers/char/riscom8.c
index b56e0e04cb4a..a82c2a2d5e6c 100644
--- a/drivers/char/riscom8.c
+++ b/drivers/char/riscom8.c
@@ -1015,6 +1015,24 @@ static int rc_open(struct tty_struct * tty, struct file * filp)
return 0;
}
+static void rc_flush_buffer(struct tty_struct *tty)
+{
+ struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ unsigned long flags;
+
+ if (rc_paranoia_check(port, tty->name, "rc_flush_buffer"))
+ return;
+
+ spin_lock_irqsave(&riscom_lock, flags);
+
+ port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
+
+ spin_unlock_irqrestore(&riscom_lock, flags);
+
+ tty_wakeup(tty);
+}
+
+
static void rc_close(struct tty_struct * tty, struct file * filp)
{
struct riscom_port *port = (struct riscom_port *) tty->driver_data;
@@ -1078,8 +1096,7 @@ static void rc_close(struct tty_struct * tty, struct file * filp)
}
}
rc_shutdown_port(bp, port);
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
+ rc_flush_buffer(tty);
tty_ldisc_flush(tty);
tty->closing = 0;
@@ -1213,23 +1230,6 @@ static int rc_chars_in_buffer(struct tty_struct *tty)
return port->xmit_cnt;
}
-static void rc_flush_buffer(struct tty_struct *tty)
-{
- struct riscom_port *port = (struct riscom_port *)tty->driver_data;
- unsigned long flags;
-
- if (rc_paranoia_check(port, tty->name, "rc_flush_buffer"))
- return;
-
- spin_lock_irqsave(&riscom_lock, flags);
-
- port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
-
- spin_unlock_irqrestore(&riscom_lock, flags);
-
- tty_wakeup(tty);
-}
-
static int rc_tiocmget(struct tty_struct *tty, struct file *file)
{
struct riscom_port *port = (struct riscom_port *)tty->driver_data;