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usb: dwc3: optimize interrupt loop

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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>
This commit is contained in:
Marek Szyprowski 2015-03-03 17:32:12 +01:00 committed by Marek Vasut
parent 16bece51c5
commit 137f7c590d
2 changed files with 13 additions and 9 deletions
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7
drivers/usb/dwc3/core.c
View File

@ -769,18 +769,11 @@ void dwc3_uboot_exit(int index)
void dwc3_uboot_handle_interrupt(int index)
{
struct dwc3 *dwc = NULL;
int i;
struct dwc3_event_buffer *evt;
list_for_each_entry(dwc, &dwc3_list, list) {
if (dwc->index != index)
continue;
for (i = 0; i < dwc->num_event_buffers; i++) {
evt = dwc->ev_buffs[i];
dwc3_flush_cache((int)evt->buf, evt->length);
}
dwc3_gadget_uboot_handle_interrupt(dwc);
break;
}

15
drivers/usb/dwc3/gadget.c
View File

@ -2683,6 +2683,17 @@ void dwc3_gadget_exit(struct dwc3 *dwc)
*/
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);
}
}