diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2013-12-02 13:56:03 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-08 16:56:05 -0800 |
| commit | 82f91fe092b6eacd82e976b8955443f9fd97d07e (patch) | |
| tree | 42b967f676e8054a222e58521024babe250b88c9 /drivers/tty/n_gsm.c | |
| parent | 6c67716d64103e5a8e23c45dcdfc76520033d479 (diff) | |
tty: Always handle NULL flag ptr
Most line disciplines already handle the undocumented NULL flag
ptr in their .receive_buf method; however, several don't.
Document the NULL flag ptr, and correct handling in the
N_MOUSE, N_GSM0710 and N_R394 line disciplines.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/n_gsm.c')
| -rw-r--r-- | drivers/tty/n_gsm.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index c0f76da5530..c09db11b883 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -2269,14 +2269,15 @@ static void gsmld_receive_buf(struct tty_struct *tty, const unsigned char *cp, char *f; int i; char buf[64]; - char flags; + char flags = TTY_NORMAL; if (debug & 4) print_hex_dump_bytes("gsmld_receive: ", DUMP_PREFIX_OFFSET, cp, count); for (i = count, dp = cp, f = fp; i; i--, dp++) { - flags = *f++; + if (f) + flags = *f++; switch (flags) { case TTY_NORMAL: gsm->receive(gsm, *dp); |