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 42acb45e1ab42dd9436244bec16d4903603d6089..7877aa8e2aec54ec0b7bb80de1e82012e4556780 100644 (file)
--- 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);