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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-07-27 00:54:47 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-07-27 00:54:47 -0700 |
| commit | aa7eb8e78d8ecd6cd0475d86ea8385ff9cb47ece (patch) | |
| tree | 3f9e98fadd5124fb05e8f6f9b06aa23698d4f215 /drivers/tty/tty_buffer.c | |
| parent | cca8edfd2ec2a34d9f50f593bc753bb11e1bc1f5 (diff) | |
| parent | 3c6b50141ef9f0a8844bf1357b80c0cdf518bf05 (diff) | |
Merge branch 'next' into for-linus
Diffstat (limited to 'drivers/tty/tty_buffer.c')
| -rw-r--r-- | drivers/tty/tty_buffer.c | 14 |
1 files changed, 2 insertions, 12 deletions
diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c index f1a7918d71a..6c9b7cd6778 100644 --- a/drivers/tty/tty_buffer.c +++ b/drivers/tty/tty_buffer.c @@ -413,8 +413,7 @@ static void flush_to_ldisc(struct work_struct *work) spin_lock_irqsave(&tty->buf.lock, flags); if (!test_and_set_bit(TTY_FLUSHING, &tty->flags)) { - struct tty_buffer *head, *tail = tty->buf.tail; - int seen_tail = 0; + struct tty_buffer *head; while ((head = tty->buf.head) != NULL) { int count; char *char_buf; @@ -424,15 +423,6 @@ static void flush_to_ldisc(struct work_struct *work) if (!count) { if (head->next == NULL) break; - /* - There's a possibility tty might get new buffer - added during the unlock window below. We could - end up spinning in here forever hogging the CPU - completely. To avoid this let's have a rest each - time we processed the tail buffer. - */ - if (tail == head) - seen_tail = 1; tty->buf.head = head->next; tty_buffer_free(tty, head); continue; @@ -442,7 +432,7 @@ static void flush_to_ldisc(struct work_struct *work) line discipline as we want to empty the queue */ if (test_bit(TTY_FLUSHPENDING, &tty->flags)) break; - if (!tty->receive_room || seen_tail) + if (!tty->receive_room) break; if (count > tty->receive_room) count = tty->receive_room; |