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| author | Peter Hurley <peter@hurleysoftware.com> | 2016-01-11 07:40:59 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-01-28 00:01:44 +0100 |
| commit | c0cc1c5d6b67289ea2e77346e0161506b0d4f393 (patch) | |
| tree | 72ca416062ce5d5602048205ed6f74cdb255f9cc /drivers/tty/tty_ldisc.c | |
| parent | tty: Reset c_line from driver's init_termios (diff) | |
| download | linux-c0cc1c5d6b67289ea2e77346e0161506b0d4f393.tar.xz linux-c0cc1c5d6b67289ea2e77346e0161506b0d4f393.zip | |
tty: Fix comments for tty_ldisc_get()
tty_ldisc_get() returns ERR_PTR() values if unsuccessful, not NULL;
fix function header documentation.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/tty_ldisc.c')
| -rw-r--r-- | drivers/tty/tty_ldisc.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c index b2e8210639dd..4008f5f65345 100644 --- a/drivers/tty/tty_ldisc.c +++ b/drivers/tty/tty_ldisc.c @@ -140,9 +140,16 @@ static void put_ldops(struct tty_ldisc_ops *ldops) * @disc: ldisc number * * Takes a reference to a line discipline. Deals with refcounts and - * module locking counts. Returns NULL if the discipline is not available. - * Returns a pointer to the discipline and bumps the ref count if it is - * available + * module locking counts. + * + * Returns: -EINVAL if the discipline index is not [N_TTY..NR_LDISCS] or + * if the discipline is not registered + * -EAGAIN if request_module() failed to load or register the + * the discipline + * -ENOMEM if allocation failure + * + * Otherwise, returns a pointer to the discipline and bumps the + * ref count * * Locking: * takes tty_ldiscs_lock to guard against ldisc races |