[media] gspca: Fix input urb creation / destruction surrounding suspe…

…nd resume

1) We always re-create the input-urb on resume, so we must also always
   destroy it on suspend to avoid leaking it
2) If we're going to do an init_transfer, then that will destroy the urb
   before starting the stream (nop if there is none), and (re-)create it
   once the stream is started. So there is little use in creating it, if
   we're going to do an init_transfer immediately afterward

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/usb/gspca/gspca.c

@@ -2391,19 +2391,22 @@ int gspca_suspend(struct usb_interface *intf, pm_message_t message)
 {
 	struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
 
+	gspca_input_destroy_urb(gspca_dev);
+
 	if (!gspca_dev->streaming)
 		return 0;
+
 	mutex_lock(&gspca_dev->usb_lock);
 	gspca_dev->frozen = 1;		/* avoid urb error messages */
 	gspca_dev->usb_err = 0;
 	if (gspca_dev->sd_desc->stopN)
 		gspca_dev->sd_desc->stopN(gspca_dev);
 	destroy_urbs(gspca_dev);
-	gspca_input_destroy_urb(gspca_dev);
 	gspca_set_alt0(gspca_dev);
 	if (gspca_dev->sd_desc->stop0)
 		gspca_dev->sd_desc->stop0(gspca_dev);
 	mutex_unlock(&gspca_dev->usb_lock);
+
 	return 0;
 }
 EXPORT_SYMBOL(gspca_suspend);
@@ -2417,7 +2420,6 @@ int gspca_resume(struct usb_interface *intf)
 	gspca_dev->frozen = 0;
 	gspca_dev->usb_err = 0;
 	gspca_dev->sd_desc->init(gspca_dev);
-	gspca_input_create_urb(gspca_dev);
 	/*
 	 * Most subdrivers send all ctrl values on sd_start and thus
 	 * only write to the device registers on s_ctrl when streaming ->
@@ -2427,7 +2429,10 @@ int gspca_resume(struct usb_interface *intf)
 	gspca_dev->streaming = 0;
 	if (streaming)
 		ret = gspca_init_transfer(gspca_dev);
+	else
+		gspca_input_create_urb(gspca_dev);
 	mutex_unlock(&gspca_dev->usb_lock);
+
 	return ret;
 }
 EXPORT_SYMBOL(gspca_resume);