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
