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| author | Peter Hurley <peter@hurleysoftware.com> | 2015-01-16 15:05:36 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-02-02 10:11:26 -0800 |
| commit | 5e28cca1539f3532cb2392710655cd3e562cee8b (patch) | |
| tree | d37777b70cbdb5483cc413b84d52d43a92eef7a7 /drivers/tty/n_tty.c | |
| parent | a342846f9b0448996f56ebece80454d41b431ce2 (diff) | |
| download | linux-stable-5e28cca1539f3532cb2392710655cd3e562cee8b.tar.gz linux-stable-5e28cca1539f3532cb2392710655cd3e562cee8b.tar.bz2 linux-stable-5e28cca1539f3532cb2392710655cd3e562cee8b.zip | |
n_tty: Simplify throttle threshold calculation
The adjustments performed by receive_room() are to ensure a line
termination can always be written to the read buffer. However,
these adjustments are irrelevant to the throttle threshold (because
the threshold < buffer limit).
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/n_tty.c')
| -rw-r--r-- | drivers/tty/n_tty.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index d4b14c30794e..7efabc4673b6 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -262,7 +262,7 @@ static void n_tty_check_throttle(struct tty_struct *tty) while (1) { int throttled; tty_set_flow_change(tty, TTY_THROTTLE_SAFE); - if (receive_room(tty) >= TTY_THRESHOLD_THROTTLE) + if (N_TTY_BUF_SIZE - read_cnt(ldata) >= TTY_THRESHOLD_THROTTLE) break; throttled = tty_throttle_safe(tty); if (!throttled) |