uml: console driver cleanups

Console driver cleanups -
	Changed an instance of foo = bar + foo to foo += bar
	Removed checks of tty->stopped - I don't think the low-level
driver has any business looking at that
	Removed an annoying warning

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 83bf15a..5cff653 100644 (file)
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -48,7 +48,7 @@ static int write_room(struct line *line)
        n = line->head - line->tail;
 
        if (n <= 0)
-               n = LINE_BUFSIZE + n; /* The other case */
+               n += LINE_BUFSIZE; /* The other case */
        return n - 1;
 }
 
@@ -58,17 +58,10 @@ int line_write_room(struct tty_struct *tty)
        unsigned long flags;
        int room;
 
-       if (tty->stopped)
-               return 0;
-
        spin_lock_irqsave(&line->lock, flags);
        room = write_room(line);
        spin_unlock_irqrestore(&line->lock, flags);
 
-       /*XXX: Warning to remove */
-       if (0 == room)
-               printk(KERN_DEBUG "%s: %s: no room left in buffer\n",
-                      __FUNCTION__,tty->name);
        return room;
 }
 
@@ -79,8 +72,7 @@ int line_chars_in_buffer(struct tty_struct *tty)
        int ret;
 
        spin_lock_irqsave(&line->lock, flags);
-
-       /*write_room subtracts 1 for the needed NULL, so we readd it.*/
+       /* write_room subtracts 1 for the needed NULL, so we readd it.*/
        ret = LINE_BUFSIZE - (write_room(line) + 1);
        spin_unlock_irqrestore(&line->lock, flags);
 
@@ -184,10 +176,6 @@ void line_flush_buffer(struct tty_struct *tty)
        unsigned long flags;
        int err;
 
-       /*XXX: copied from line_write, verify if it is correct!*/
-       if (tty->stopped)
-               return;
-
        spin_lock_irqsave(&line->lock, flags);
        err = flush_buffer(line);
        spin_unlock_irqrestore(&line->lock, flags);
@@ -213,9 +201,6 @@ int line_write(struct tty_struct *tty, const unsigned char *buf, int len)
        unsigned long flags;
        int n, ret = 0;
 
-       if (tty->stopped)
-               return 0;
-
        spin_lock_irqsave(&line->lock, flags);
        if (line->head != line->tail)
                ret = buffer_data(line, buf, len);