From: Felipe F. Tonello <eu@felipetonello.com>
Date: Tue, 10 Nov 2015 17:52:03 +0000 (+0000)
Subject: usb: gadget: f_midi: Transmit data only when IN ep is enabled
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e9ca7e4bb30cbf4c8d2e2e34681a967c10b3ff54;p=linux-beck.git

usb: gadget: f_midi: Transmit data only when IN ep is enabled

This makes sure f_midi doesn't try to enqueue data when the IN endpoint is
disabled, ie, USB cable is disconnected.

Reviewed-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---

diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c
index 42acb45e1ab4..7877aa8e2aec 100644
--- a/drivers/usb/gadget/function/f_midi.c
+++ b/drivers/usb/gadget/function/f_midi.c
@@ -545,7 +545,7 @@ static void f_midi_transmit(struct f_midi *midi, struct usb_request *req)
 		}
 	}
 
-	if (req->length > 0) {
+	if (req->length > 0 && ep->enabled) {
 		int err;
 
 		err = usb_ep_queue(ep, req, GFP_ATOMIC);