svn commit: r340315 - stable/12/sys/dev/usb/controller

[Hans Petter Selasky]

Author: hselasky
Date: Sat Nov 10 10:30:01 2018
New Revision: 340315
URL: https://svnweb.freebsd.org/changeset/base/340315

Log:
  MFC r340212:
  Sometimes the complete split packet may be queued too early and the
  transaction translator will return a NAK. Ignore this message and
  retry the complete split instead.
  
  Approved by:		re (kib)
  Sponsored by:		Mellanox Technologies

Modified:
  stable/12/sys/dev/usb/controller/dwc_otg.c
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/sys/dev/usb/controller/dwc_otg.c
==============================================================================
--- stable/12/sys/dev/usb/controller/dwc_otg.c	Sat Nov 10 03:10:22 2018	(r340314)
+++ stable/12/sys/dev/usb/controller/dwc_otg.c	Sat Nov 10 10:30:01 2018	(r340315)
@@ -1432,6 +1432,19 @@ dwc_otg_host_data_rx(struct dwc_otg_softc *sc, struct 
 					goto receive_pkt;
 				}
 			} else if (td->ep_type == UE_ISOCHRONOUS) {
+				if (td->hcsplt != 0) {
+					/*
+					 * Sometimes the complete
+					 * split packet may be queued
+					 * too early and the
+					 * transaction translator will
+					 * return a NAK. Ignore
+					 * this message and retry the
+					 * complete split instead.
+					 */
+					DPRINTF("Retrying complete split\n");
+					goto receive_pkt;
+				}
 				goto complete;
 			}
 			td->did_nak = 1;