app: ppp: Don't release the PPP pipe unnecessary

SeppoTakalo · trantanen · commit 255f38a72a24 · 2026-03-24T10:46:45.000+02:00
On the AT#XPPP=0, we should still keep the pipe on certain cases.
Mostly, when PPP is running on DLC 2.

So leave the channel release to AT+CGDATA command, or CMUX module.

Signed-off-by: Seppo Takalo &lt;seppo.takalo@nordicsemi.no&gt;
diff --git a/app/src/sm_ppp.c b/app/src/sm_ppp.c
@@ -719,7 +719,7 @@ static int handle_at_ppp(enum at_parser_cmd_type cmd_type, struct at_parser *par
 	} else {
 		rsp_send_ok();
 		sm_ppp_set_auto_start(false);
-		sm_ppp_detach();
+		delegate_ppp_event(PPP_STOP, PPP_REASON_CMD);
 	}
 	return -SILENT_AT_COMMAND_RET;
 }

Original file line number	Diff line number	Diff line change
`@@ -719,7 +719,7 @@ static int handle_at_ppp(enum at_parser_cmd_type cmd_type, struct at_parser *par`
`719`	`719`	`} else {`
`720`	`720`	`rsp_send_ok();`
`721`	`721`	`sm_ppp_set_auto_start(false);`
`722`		`- sm_ppp_detach();`
	`722`	`+ delegate_ppp_event(PPP_STOP, PPP_REASON_CMD);`
`723`	`723`	`}`
`724`	`724`	`return -SILENT_AT_COMMAND_RET;`
`725`	`725`	`}`