Re: [PATCH] MdeModulePkg/Xhci: Remove TRB when canceling Async Int Transfer

["Zeng, Star" <star.zeng@intel.com>]

Could you correct the indention in the code block below?
With that corrected, Reviewed-by: Star Zeng <star.zeng@intel.com>

+
+      //
+      // Device doesn't finish the IntTransfer until real data comes
+      // So the TRB should be removed as well.
+      //
+    Status = XhcDequeueTrbFromEndpoint (Xhc, Urb);
+    if (EFI_ERROR (Status)) {
+      DEBUG ((EFI_D_ERROR, "XhciDelAllAsyncIntTransfers: XhcDequeueTrbFromEndpoint failed\n"));
+    }
+


Thanks,
Star
-----Original Message-----
From: Ni, Ruiyu 
Sent: Wednesday, May 31, 2017 11:04 AM
To: edk2-devel@lists.01.org
Cc: Wu, Hao A <hao.a.wu@intel.com>; Zeng, Star <star.zeng@intel.com>
Subject: [PATCH] MdeModulePkg/Xhci: Remove TRB when canceling Async Int Transfer

Some USB devices don't report data periodically through Int Transfer. They report data only when be asked. If the TRB is not removed from the XHCI HW, when next time HOST asks data again, the data is reported but consumed by the previous TRB, which results the HOST thinks data never comes.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao A Wu <hao.a.wu@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
---
 MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c b/MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c
index 4bec76a85f..058e8f36ba 100644
--- a/MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c
+++ b/MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c
@@ -2,7 +2,7 @@
 
   XHCI transfer scheduling routines.
 
-Copyright (c) 2011 - 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2011 - 2017, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials  are licensed and made available under the terms and conditions of the BSD License  which accompanies this distribution.  The full text of the license may be found at @@ -1319,6 +1319,7 @@ XhciDelAsyncIntTransfer (
   LIST_ENTRY              *Next;
   URB                     *Urb;
   EFI_USB_DATA_DIRECTION  Direction;
+  EFI_STATUS              Status;
 
   Direction = ((EpNum & 0x80) != 0) ? EfiUsbDataIn : EfiUsbDataOut;
   EpNum    &= 0x0F;
@@ -1330,6 +1331,15 @@ XhciDelAsyncIntTransfer (
     if ((Urb->Ep.BusAddr == BusAddr) &&
         (Urb->Ep.EpAddr == EpNum) &&
         (Urb->Ep.Direction == Direction)) {
+      //
+      // Device doesn't finish the IntTransfer until real data comes
+      // So the TRB should be removed as well.
+      //
+      Status = XhcDequeueTrbFromEndpoint (Xhc, Urb);
+      if (EFI_ERROR (Status)) {
+        DEBUG ((EFI_D_ERROR, "XhciDelAsyncIntTransfer: XhcDequeueTrbFromEndpoint failed\n"));
+      }
+
       RemoveEntryList (&Urb->UrbList);
       FreePool (Urb->Data);
       XhcFreeUrb (Xhc, Urb);
@@ -1354,9 +1364,20 @@ XhciDelAllAsyncIntTransfers (
   LIST_ENTRY              *Entry;
   LIST_ENTRY              *Next;
   URB                     *Urb;
+  EFI_STATUS              Status;
 
   EFI_LIST_FOR_EACH_SAFE (Entry, Next, &Xhc->AsyncIntTransfers) {
     Urb = EFI_LIST_CONTAINER (Entry, URB, UrbList);
+
+      //
+      // Device doesn't finish the IntTransfer until real data comes
+      // So the TRB should be removed as well.
+      //
+    Status = XhcDequeueTrbFromEndpoint (Xhc, Urb);
+    if (EFI_ERROR (Status)) {
+      DEBUG ((EFI_D_ERROR, "XhciDelAllAsyncIntTransfers: XhcDequeueTrbFromEndpoint failed\n"));
+    }
+
     RemoveEntryList (&Urb->UrbList);
     FreePool (Urb->Data);
     XhcFreeUrb (Xhc, Urb);
--
2.12.2.windows.2