UI/UIH frame can be received as a command from other station or as a response to a command we issued earlier.
Add this knowledge to the source code as a comment and remove useless #if 0/#endif block. Signed-off-by: Andrej Krpic <a...@tnode.com> --- drivers/tty/n_gsm.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 8551fa4..3c4c521 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -1852,10 +1852,11 @@ static void gsm_queue(struct gsm_mux *gsm) case UI|PF: case UIH: case UIH|PF: -#if 0 - if (cr) - goto invalid; -#endif + /* Don't reject frames based on cr value as UI/UIH + * frame can be received as a command from other + * station or as a response to a command we issued + * earlier. + */ if (dlci == NULL || dlci->state != DLCI_OPEN) { gsm_response(gsm, address, DM|PF); return; -- 2.7.0