usb: dwc3: optimize interrupt loop
There is no point in calling dwc3_thread_interrupt() if no event is
pending. There is also no point in flushing event cache in EVERY loop
iteration.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 7c342c6..eb31cd9 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2683,6 +2683,17 @@
*/
void dwc3_gadget_uboot_handle_interrupt(struct dwc3 *dwc)
{
- dwc3_interrupt(0, dwc);
- dwc3_thread_interrupt(0, dwc);
+ int ret = dwc3_interrupt(0, dwc);
+
+ if (ret == IRQ_WAKE_THREAD) {
+ int i;
+ struct dwc3_event_buffer *evt;
+
+ for (i = 0; i < dwc->num_event_buffers; i++) {
+ evt = dwc->ev_buffs[i];
+ dwc3_flush_cache((int)evt->buf, evt->length);
+ }
+
+ dwc3_thread_interrupt(0, dwc);
+ }
}