diff options
| -rw-r--r-- | drivers/usb/chipidea/udc.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index fd6032874bf3..6752c86c6eb9 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -753,10 +753,17 @@ static int _hardware_enqueue(struct ci_hw_ep *hwep, struct ci_hw_req *hwreq) do { hw_write(ci, OP_USBCMD, USBCMD_ATDTW, USBCMD_ATDTW); tmp_stat = hw_read(ci, OP_ENDPTSTAT, BIT(n)); - } while (!hw_read(ci, OP_USBCMD, USBCMD_ATDTW)); + } while (!hw_read(ci, OP_USBCMD, USBCMD_ATDTW) && tmp_stat); hw_write(ci, OP_USBCMD, USBCMD_ATDTW, 0); if (tmp_stat) goto done; + + /* OP_ENDPTSTAT will be clear by HW when the endpoint met + * err. This dTD don't push to dQH if current dTD point is + * not the last one in previous request. + */ + if (hwep->qh.ptr->curr != cpu_to_le32(prevlastnode->dma)) + goto done; } /* QH configuration */ |