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MdeModulePkg/EhciDxe: call EhcFreeUrb when int-transfer completes 

It didn't cause big issues when VT-d was disabled.
But in VT-d enabled platform, lack of EhcFreeUrb call caused
the DMA data was not moved back to user's buffer.
It caused the correct data cannot be got through sync interrupt
transfer.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
This commit is contained in:
Ruiyu Ni 2018-01-15 16:10:15 +08:00
parent 01bd1c98fa
commit c74805f1e7
1 changed files with 2 additions and 1 deletions
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3
MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c
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@ -11,7 +11,7 @@
and companion host controller when UHCI or OHCI gets attached earlier than EHCI and a
USB 2.0 device inserts.
Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2018, 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
@ -1220,6 +1220,7 @@ EhcSyncInterruptTransfer (
Status = EFI_SUCCESS;
}
EhcFreeUrb (Ehc, Urb);
ON_EXIT:
Ehc->PciIo->Flush (Ehc->PciIo);
gBS->RestoreTPL (OldTpl);