diff options
| author | Paul Fulghum <paulkf@microgate.com> | 2006-01-11 17:51:48 -0600 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-11 16:12:16 -0800 |
| commit | 607f4e3864a4306be0d0ad11ff34284c239aad1b (patch) | |
| tree | c3bfaa2abc5fb7cc33fc28d8606a0d4721d1700b | |
| parent | 4cec87361462d570d6a67888feda41e77e0a9562 (diff) | |
[PATCH] new tty buffering access fix
Fix typos in new tty buffering that incorrectly
access and update buffers in pending queue.
Signed-off-by: Paul Fulghum <paulkf@microgate.com>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | drivers/char/tty_io.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c index 1eda82b31a6..eb8b5be4e24 100644 --- a/drivers/char/tty_io.c +++ b/drivers/char/tty_io.c @@ -312,7 +312,7 @@ static struct tty_buffer *tty_buffer_find(struct tty_struct *tty, size_t size) int tty_buffer_request_room(struct tty_struct *tty, size_t size) { - struct tty_buffer *b = tty->buf.head, *n; + struct tty_buffer *b = tty->buf.tail, *n; int left = 0; /* OPTIMISATION: We could keep a per tty "zero" sized buffer to @@ -326,7 +326,6 @@ int tty_buffer_request_room(struct tty_struct *tty, size_t size) n = tty_buffer_find(tty, size); if(n == NULL) return left; - n->next = b; if(b != NULL) b->next = n; else @@ -2751,6 +2750,8 @@ static void flush_to_ldisc(void *private_) spin_lock_irqsave(&tty->read_lock, flags); while((tbuf = tty->buf.head) != NULL) { tty->buf.head = tbuf->next; + if (tty->buf.head == NULL) + tty->buf.tail = NULL; spin_unlock_irqrestore(&tty->read_lock, flags); /* printk("Process buffer %p for %d\n", tbuf, tbuf->used); */ disc->receive_buf(tty, tbuf->char_buf_ptr, @@ -2759,7 +2760,6 @@ static void flush_to_ldisc(void *private_) spin_lock_irqsave(&tty->read_lock, flags); tty_buffer_free(tty, tbuf); } - tty->buf.tail = NULL; spin_unlock_irqrestore(&tty->read_lock, flags); out: tty_ldisc_deref(disc); |