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| author | Paul Moore <pmoore@redhat.com> | 2014-06-17 17:30:23 -0400 |
|---|---|---|
| committer | Paul Moore <pmoore@redhat.com> | 2014-06-17 17:30:23 -0400 |
| commit | 170b5910d9fbea79de1bb40df22eda5f98250c0c (patch) | |
| tree | ca9560e878d2842d45c6f99077d0d8b8f8b0f9ba /drivers/tty/n_tty.c | |
| parent | 47dd0b76ace953bd2c0479076db0d3e3b9594003 (diff) | |
| parent | 1860e379875dfe7271c649058aeddffe5afd9d0d (diff) | |
Merge tag 'v3.15' into next
Linux 3.15
Diffstat (limited to 'drivers/tty/n_tty.c')
| -rw-r--r-- | drivers/tty/n_tty.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index d15624c1b75..fe9d129c873 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -1900,13 +1900,10 @@ 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) ? 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) - return 1; - - return 0; + if (ldata->icanon && !L_EXTPROC(tty)) + return ldata->canon_head != ldata->read_tail; + else + return read_cnt(ldata) >= amt; } /** @@ -2356,8 +2353,12 @@ static ssize_t n_tty_write(struct tty_struct *tty, struct file *file, if (tty->ops->flush_chars) tty->ops->flush_chars(tty); } else { + struct n_tty_data *ldata = tty->disc_data; + while (nr > 0) { + mutex_lock(&ldata->output_lock); c = tty->ops->write(tty, b, nr); + mutex_unlock(&ldata->output_lock); if (c < 0) { retval = c; goto break_out; |