OvmfPkg: VirtioNetDxe: fix some build errors emitted by Visual Studio

These were found with the gcc-4.4 option "-Wconversion" after Jordan
reported the build failure under Visual Studio. The patch was originally
posted to edk2-devel as "silence.patch":

http://thread.gmane.org/gmane.comp.bios.tianocore.devel/2804/focus=2972

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14419 6f19259b-4bc3-4df7-8a09-765794883524

2 files changed, 10 insertions, 7 deletions

diff --git a/OvmfPkg/VirtioNetDxe/SnpInitialize.c b/OvmfPkg/VirtioNetDxe/SnpInitialize.c
index 39282d9a4..6cee01407 100644
--- a/OvmfPkg/VirtioNetDxe/SnpInitialize.c
+++ b/OvmfPkg/VirtioNetDxe/SnpInitialize.c
@@ -120,7 +120,8 @@ VirtioNetInitTx (
 {

   UINTN PktIdx;

 

-  Dev->TxMaxPending = MIN (Dev->TxRing.QueueSize / 2, VNET_MAX_PENDING);

+  Dev->TxMaxPending = (UINT16) MIN (Dev->TxRing.QueueSize / 2,

+                                 VNET_MAX_PENDING);

   Dev->TxCurPending = 0;

   Dev->TxFreeStack  = AllocatePool (Dev->TxMaxPending *

                         sizeof *Dev->TxFreeStack);

@@ -141,7 +142,7 @@ VirtioNetInitTx (
     Dev->TxRing.Desc[DescIdx].Addr  = (UINTN) &Dev->TxSharedReq;

     Dev->TxRing.Desc[DescIdx].Len   = sizeof Dev->TxSharedReq;

     Dev->TxRing.Desc[DescIdx].Flags = VRING_DESC_F_NEXT;

-    Dev->TxRing.Desc[DescIdx].Next  = DescIdx + 1;

+    Dev->TxRing.Desc[DescIdx].Next  = (UINT16) (DescIdx + 1);

 

     //

     // The second descriptor of each pending TX packet is updated on the fly,

@@ -221,7 +222,7 @@ VirtioNetInitRx (
   // Limit the number of pending RX packets if the queue is big. The division

   // by two is due to the above "two descriptors per packet" trait.

   //

-  RxAlwaysPending = MIN (Dev->RxRing.QueueSize / 2, VNET_MAX_PENDING);

+  RxAlwaysPending = (UINT16) MIN (Dev->RxRing.QueueSize / 2, VNET_MAX_PENDING);

 

   Dev->RxBuf = AllocatePool (RxAlwaysPending * RxBufSize);

   if (Dev->RxBuf == NULL) {

@@ -261,11 +262,12 @@ VirtioNetInitRx (
     Dev->RxRing.Desc[DescIdx].Addr  = (UINTN) RxPtr;

     Dev->RxRing.Desc[DescIdx].Len   = sizeof (VIRTIO_NET_REQ);

     Dev->RxRing.Desc[DescIdx].Flags = VRING_DESC_F_WRITE | VRING_DESC_F_NEXT;

-    Dev->RxRing.Desc[DescIdx].Next  = DescIdx + 1;

+    Dev->RxRing.Desc[DescIdx].Next  = (UINT16) (DescIdx + 1);

     RxPtr += Dev->RxRing.Desc[DescIdx++].Len;

 

     Dev->RxRing.Desc[DescIdx].Addr  = (UINTN) RxPtr;

-    Dev->RxRing.Desc[DescIdx].Len   = RxBufSize - sizeof (VIRTIO_NET_REQ);

+    Dev->RxRing.Desc[DescIdx].Len   = (UINT32) (RxBufSize -

+                                                sizeof (VIRTIO_NET_REQ));

     Dev->RxRing.Desc[DescIdx].Flags = VRING_DESC_F_WRITE;

     RxPtr += Dev->RxRing.Desc[DescIdx++].Len;

   }

diff --git a/OvmfPkg/VirtioNetDxe/SnpReceive.c b/OvmfPkg/VirtioNetDxe/SnpReceive.c
index eb3a2ba9b..dcff6a09f 100644
--- a/OvmfPkg/VirtioNetDxe/SnpReceive.c
+++ b/OvmfPkg/VirtioNetDxe/SnpReceive.c
@@ -156,7 +156,7 @@ VirtioNetReceive (
   RxPtr += SIZE_OF_VNET (VhdrMac);

 

   if (Protocol != NULL) {

-    *Protocol = ((UINT16) RxPtr[0] << 8) | RxPtr[1];

+    *Protocol = (UINT16) ((RxPtr[0] << 8) | RxPtr[1]);

   }

   RxPtr += sizeof (UINT16);

 

@@ -169,7 +169,8 @@ RecycleDesc:
   // virtio-0.9.5, 2.4.1 Supplying Buffers to The Device

   //

   AvailIdx = *Dev->RxRing.Avail.Idx;

-  Dev->RxRing.Avail.Ring[AvailIdx++ % Dev->RxRing.QueueSize] = DescIdx;

+  Dev->RxRing.Avail.Ring[AvailIdx++ % Dev->RxRing.QueueSize] =

+    (UINT16) DescIdx;

 

   MemoryFence ();

   *Dev->RxRing.Avail.Idx = AvailIdx;