V4L/DVB (10385): gspca - main: Fix memory leak when USB disconnection…

… while streaming.

Resetting the streaming flag on disconnection prevented the URBs to be freed
when streaming was active.
Also, USBs cannot be killed after disconnection (oops in [usbcore] unlink1).

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/gspca/gspca.c

@@ -423,7 +423,8 @@ static void destroy_urbs(struct gspca_dev *gspca_dev)
 			break;
 
 		gspca_dev->urb[i] = NULL;
-		usb_kill_urb(urb);
+		if (!gspca_dev->present)
+			usb_kill_urb(urb);
 		if (urb->transfer_buffer != NULL)
 			usb_buffer_free(gspca_dev->dev,
 					urb->transfer_buffer_length,
@@ -1950,7 +1951,6 @@ void gspca_disconnect(struct usb_interface *intf)
 	struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
 
 	gspca_dev->present = 0;
-	gspca_dev->streaming = 0;
 
 	usb_set_intfdata(intf, NULL);