diff options
| author |   Paul Fulghum <paulkf@microgate.com> | 2006-02-10 01:51:14 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-10 08:13:12 -0800 |
| commit | 8977d929e49021d9a6e031310aab01fa72f849c2 (patch) | |
| tree | 13697e607b1153666139114242964f9982acc328 /include/linux/tty_flip.h | |
| parent | [PATCH] slab: Avoid deadlock at kmem_cache_create/kmem_cache_destroy (diff) | |
| download | linux-dev-8977d929e49021d9a6e031310aab01fa72f849c2.tar.xz linux-dev-8977d929e49021d9a6e031310aab01fa72f849c2.zip | |
[PATCH] tty buffering stall fix
Prevent stalled processing of received data when a driver allocates tty
buffer space but does not immediately follow the allocation with more data
and a call to schedule receive tty processing. (example: hvc_console) This
bug was introduced by the first locking patch for the new tty buffering.
Signed-off-by: Paul Fulghum <paulkf@microgate.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/tty_flip.h')
| -rw-r--r-- | include/linux/tty_flip.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/tty_flip.h b/include/linux/tty_flip.h index 82961eb19888..222faf97d5f9 100644 --- a/include/linux/tty_flip.h +++ b/include/linux/tty_flip.h @@ -29,8 +29,10 @@ _INLINE_ void tty_schedule_flip(struct tty_struct *tty) { unsigned long flags; spin_lock_irqsave(&tty->buf.lock, flags); - if (tty->buf.tail != NULL) + if (tty->buf.tail != NULL) { tty->buf.tail->active = 0; + tty->buf.tail->commit = tty->buf.tail->used; + } spin_unlock_irqrestore(&tty->buf.lock, flags); schedule_delayed_work(&tty->buf.work, 1); } |