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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-07 02:28:16 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-07 02:28:16 +0200 |
| commit | 97a7729a5c2f01faa076f38a7ec010961b456823 (patch) | |
| tree | d1aaecf81d1357b5920579347e6bb894b4bfe11c /drivers/tty/n_tty.c | |
| parent | serial: mxs-auart: set the FIFO size to DMA buffer size (diff) | |
| parent | Linux 3.12-rc4 (diff) | |
| download | linux-97a7729a5c2f01faa076f38a7ec010961b456823.tar.xz linux-97a7729a5c2f01faa076f38a7ec010961b456823.zip | |
Merge 3.12-rc4 into tty-next
We want the tty fixes in this branch as well.
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 | 46 |
1 files changed, 26 insertions, 20 deletions
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 09505ff4fb25..4e69f3bd7fd8 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -2176,28 +2176,34 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file, if (!input_available_p(tty, 0)) { if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) { - retval = -EIO; - break; - } - if (tty_hung_up_p(file)) - break; - if (!timeout) - break; - if (file->f_flags & O_NONBLOCK) { - retval = -EAGAIN; - break; - } - if (signal_pending(current)) { - retval = -ERESTARTSYS; - break; - } - n_tty_set_room(tty); - up_read(&tty->termios_rwsem); + up_read(&tty->termios_rwsem); + tty_flush_to_ldisc(tty); + down_read(&tty->termios_rwsem); + if (!input_available_p(tty, 0)) { + retval = -EIO; + break; + } + } else { + if (tty_hung_up_p(file)) + break; + if (!timeout) + break; + if (file->f_flags & O_NONBLOCK) { + retval = -EAGAIN; + break; + } + if (signal_pending(current)) { + retval = -ERESTARTSYS; + break; + } + n_tty_set_room(tty); + up_read(&tty->termios_rwsem); - timeout = schedule_timeout(timeout); + timeout = schedule_timeout(timeout); - down_read(&tty->termios_rwsem); - continue; + down_read(&tty->termios_rwsem); + continue; + } } __set_current_state(TASK_RUNNING); |