Commit bd16a409 authored Mar 18, 2019 by Sriharsha Allenki

usb: f_gsi: Prevent enabling data path if disconnect follows connect



In the state CONNECT_IN_PROGRESS if EVT_CONNECT is
followed by a EVT_DISCONNECT event, there is a possible case
where doorbell is unblocked with endpoints disabled resulting
in a possible spurious doorbell from the USB wrapper.

Fix this by bailing out if a connect event is followed
by disconnect.

Change-Id: I73f971548b6c13924e9f857e57fa6dd517a4e56a
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>

parent 75ecf1a3

drivers/usb/gadget/function/f_gsi.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -938,8 +938,9 @@ static void ipa_work_handler(struct work_struct *w)
		log_event_dbg("%s: ST_CON_IN_PROG_EVT_HOST_READY",
		__func__);
		} else if (event == EVT_CONNECTED) {
		if (peek_event(d_port) == EVT_SUSPEND) {
		log_event_dbg("%s: ST_CON_IN_PROG_EVT_SUSPEND",
		if (peek_event(d_port) == EVT_SUSPEND \|\|
		peek_event(d_port) == EVT_DISCONNECTED) {
		log_event_dbg("%s: NO_OP CONN_SUS CONN_DIS",
		__func__);
		break;
		}