Re: [PATCH] MdeModulePkg EhciPei: Minor refinement about IOMMU

["Yao, Jiewen" <jiewen.yao@intel.com>]

Reviewed-by: Jiewen.yao@intel.com

> -----Original Message-----
> From: Zeng, Star
> Sent: Tuesday, November 21, 2017 5:04 PM
> To: edk2-devel@lists.01.org
> Cc: Zeng, Star <star.zeng@intel.com>; Yao, Jiewen <jiewen.yao@intel.com>
> Subject: [PATCH] MdeModulePkg EhciPei: Minor refinement about IOMMU
> 
> This patch is following 2c656af04d7f.
> 1. Fix typo "XHC" to "EHC".
> 2. Reinitialize Request(Phy/Map) and Data(Phy/Map)
> in Urb, otherwise the last time value of them may
> be used in error handling when error happens.
> 
> Cc: Jiewen Yao <jiewen.yao@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Star Zeng <star.zeng@intel.com>
> ---
>  MdeModulePkg/Bus/Pci/EhciPei/EhcPeim.h |  2 +-
>  MdeModulePkg/Bus/Pci/EhciPei/EhciUrb.c | 13 ++++++-------
>  2 files changed, 7 insertions(+), 8 deletions(-)
> 
> diff --git a/MdeModulePkg/Bus/Pci/EhciPei/EhcPeim.h
> b/MdeModulePkg/Bus/Pci/EhciPei/EhcPeim.h
> index 279407475b66..715a5ab1c142 100644
> --- a/MdeModulePkg/Bus/Pci/EhciPei/EhcPeim.h
> +++ b/MdeModulePkg/Bus/Pci/EhciPei/EhcPeim.h
> @@ -99,7 +99,7 @@ struct _PEI_USB2_HC_DEV {
>    EDKII_IOMMU_PPI                     *IoMmu;
>    EFI_PEI_PPI_DESCRIPTOR              PpiDescriptor;
>    //
> -  // EndOfPei callback is used to stop the XHC DMA operation
> +  // EndOfPei callback is used to stop the EHC DMA operation
>    // after exit PEI phase.
>    //
>    EFI_PEI_NOTIFY_DESCRIPTOR           EndOfPeiNotifyList;
> diff --git a/MdeModulePkg/Bus/Pci/EhciPei/EhciUrb.c
> b/MdeModulePkg/Bus/Pci/EhciPei/EhciUrb.c
> index 3dadcd60b6fe..baacf5d56080 100644
> --- a/MdeModulePkg/Bus/Pci/EhciPei/EhciUrb.c
> +++ b/MdeModulePkg/Bus/Pci/EhciPei/EhciUrb.c
> @@ -576,7 +576,12 @@ EhcCreateUrb (
>    if (Urb->Qh == NULL) {
>      goto ON_ERROR;
>    }
> -
> +
> +  Urb->RequestPhy = NULL;
> +  Urb->RequestMap = NULL;
> +  Urb->DataPhy  = NULL;
> +  Urb->DataMap  = NULL;
> +
>    //
>    // Map the request and user data
>    //
> @@ -591,9 +596,6 @@ EhcCreateUrb (
> 
>      Urb->RequestPhy = (VOID *) ((UINTN) PhyAddr);
>      Urb->RequestMap = Map;
> -  } else {
> -    Urb->RequestPhy = NULL;
> -    Urb->RequestMap = NULL;
>    }
> 
>    if (Data != NULL) {
> @@ -613,9 +615,6 @@ EhcCreateUrb (
> 
>      Urb->DataPhy  = (VOID *) ((UINTN) PhyAddr);
>      Urb->DataMap  = Map;
> -  } else {
> -    Urb->DataPhy  = NULL;
> -    Urb->DataMap  = NULL;
>    }
> 
>    Status = EhcCreateQtds (Ehc, Urb);
> --
> 2.7.0.windows.1