From: Daniel Starke <daniel.starke@xxxxxxxxxxx>
The structure gsm_mux contains the 'unsupported' field. However, there is
currently no place in the code which increases this counter.
Increase the 'unsupported' statistics counter in the following case:
- an unsupported frame type has been requested by the peer via parameter
negotiation
- a control frame with an unsupported but known command has been received
Signed-off-by: Daniel Starke <daniel.starke@xxxxxxxxxxx>
---
drivers/tty/n_gsm.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 317aa67ed169..49cb2dbfa233 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -1589,6 +1589,7 @@ static int gsm_process_negotiation(struct gsm_mux *gsm, unsigned int addr,
if (debug & DBG_ERRORS)
pr_info("%s unsupported I frame request in PN\n",
__func__);
+ gsm->unsupported++;
return -EINVAL;
default:
if (debug & DBG_ERRORS)
@@ -1896,6 +1897,8 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command,
/* Optional unsupported commands */
case CMD_RPN: /* Remote port negotiation */
case CMD_SNC: /* Service negotiation command */
+ gsm->unsupported++;
+ fallthrough;
default:
/* Reply to bad commands with an NSC */
buf[0] = command;
--
2.34.1
