Messages in this thread Patch in this message | | | From | Peter Hurley <> | Subject | [PATCH v3 3/6] n_tty: Simplify throttle threshold calculation | Date | Fri, 16 Jan 2015 15:05:36 -0500 |
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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> --- drivers/tty/n_tty.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index d4b14c3..7efabc4 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) -- 2.2.2
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