[PATCH] MdeModulePkg NvmExpressDxe: return error code in error path

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

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=937

In NvmeExpressPassthru.c near line 659:
    Prp = NvmeCreatePrpList (
            PciIo,
            PhyAddr,
            EFI_SIZE_TO_PAGES(Offset + Bytes) - 1,
            &PrpListHost,
            &PrpListNo,
            &MapPrpList
            );
    if (Prp == NULL) {
      goto EXIT;
    }
Status is not set to an error code - Status is initialized to
EFI_SUCCESS, or set by a PciIo->Map to EFI_SUCCESS above this
code. This error path should set Status to an error code before
goto EXIT.

Cc: Hao Wu <hao.a.wu@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Michael Turner <Michael.Turner@microsoft.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
---
 MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressPassthru.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressPassthru.c b/MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressPassthru.c
index 302cfdcd8d8d..cfad1587f299 100644
--- a/MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressPassthru.c
+++ b/MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressPassthru.c
@@ -656,6 +656,7 @@ NvmExpressPassThru (
     PhyAddr = (Sq->Prp[0] + EFI_PAGE_SIZE) & ~(EFI_PAGE_SIZE - 1);
     Prp = NvmeCreatePrpList (PciIo, PhyAddr, EFI_SIZE_TO_PAGES(Offset + Bytes) - 1, &PrpListHost, &PrpListNo, &MapPrpList);
     if (Prp == NULL) {
+      Status = EFI_OUT_OF_RESOURCES;
       goto EXIT;
     }
 
-- 
2.7.0.windows.1