diff options
| author |   Peter Hurley <peter@hurleysoftware.com> | 2013-12-02 14:24:45 -0500 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-08 16:52:40 -0800 |
| commit | eafbe67f84761d787802e5113d895a316b6292fe (patch) | |
| tree | ab2e9fe80d4ce8148334c84fb11ea8f792069d7f /drivers/tty/n_tty.c | |
| parent | n_tty: Refactor PARMRK doubling checks (diff) | |
| download | linux-dev-eafbe67f84761d787802e5113d895a316b6292fe.tar.xz linux-dev-eafbe67f84761d787802e5113d895a316b6292fe.zip | |
n_tty: Refactor input_available_p() by call site
Distinguish if caller is n_tty_poll() or n_tty_read(), and
set the read/wakeup threshold accordingly.
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 | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 649fd94d1aa6..2caa2936d1b1 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -1869,14 +1869,15 @@ err: return -ENOMEM; } -static inline int input_available_p(struct tty_struct *tty, int amt) +static inline int input_available_p(struct tty_struct *tty, int poll) { struct n_tty_data *ldata = tty->disc_data; + int amt = poll && !TIME_CHAR(tty) ? MIN_CHAR(tty) : 1; if (ldata->icanon && !L_EXTPROC(tty)) { if (ldata->canon_head != ldata->read_tail) return 1; - } else if (read_cnt(ldata) >= (amt ? amt : 1)) + } else if (read_cnt(ldata) >= amt) return 1; return 0; @@ -2375,7 +2376,7 @@ static unsigned int n_tty_poll(struct tty_struct *tty, struct file *file, poll_wait(file, &tty->read_wait, wait); poll_wait(file, &tty->write_wait, wait); - if (input_available_p(tty, TIME_CHAR(tty) ? 0 : MIN_CHAR(tty))) + if (input_available_p(tty, 1)) mask |= POLLIN | POLLRDNORM; if (tty->packet && tty->link->ctrl_status) mask |= POLLPRI | POLLIN | POLLRDNORM; |