diff options
Diffstat (limited to 'OvmfPkg/VirtioNetDxe/SnpGetStatus.c')
| -rw-r--r-- | OvmfPkg/VirtioNetDxe/SnpGetStatus.c | 35 |
1 files changed, 28 insertions, 7 deletions
diff --git a/OvmfPkg/VirtioNetDxe/SnpGetStatus.c b/OvmfPkg/VirtioNetDxe/SnpGetStatus.c index 694940ea1d..9b1c352227 100644 --- a/OvmfPkg/VirtioNetDxe/SnpGetStatus.c +++ b/OvmfPkg/VirtioNetDxe/SnpGetStatus.c @@ -61,11 +61,12 @@ VirtioNetGetStatus ( OUT VOID **TxBuf OPTIONAL
)
{
- VNET_DEV *Dev;
- EFI_TPL OldTpl;
- EFI_STATUS Status;
- UINT16 RxCurUsed;
- UINT16 TxCurUsed;
+ VNET_DEV *Dev;
+ EFI_TPL OldTpl;
+ EFI_STATUS Status;
+ UINT16 RxCurUsed;
+ UINT16 TxCurUsed;
+ EFI_PHYSICAL_ADDRESS DeviceAddress;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
@@ -141,14 +142,34 @@ VirtioNetGetStatus ( ASSERT (DescIdx < (UINT32) (2 * Dev->TxMaxPending - 1));
//
- // report buffer address to caller that has been enqueued by caller
+ // get the device address that has been enqueued for the caller's
+ // transmit buffer
//
- *TxBuf = (VOID *)(UINTN) Dev->TxRing.Desc[DescIdx + 1].Addr;
+ DeviceAddress = Dev->TxRing.Desc[DescIdx + 1].Addr;
//
// now this descriptor can be used again to enqueue a transmit buffer
//
Dev->TxFreeStack[--Dev->TxCurPending] = (UINT16) DescIdx;
+
+ //
+ // Unmap the device address and perform the reverse mapping to find the
+ // caller buffer address.
+ //
+ Status = VirtioNetUnmapTxBuf (
+ Dev,
+ TxBuf,
+ DeviceAddress
+ );
+ if (EFI_ERROR (Status)) {
+ //
+ // VirtioNetUnmapTxBuf should never fail, if we have reached here
+ // that means our internal state has been corrupted
+ //
+ ASSERT (FALSE);
+ Status = EFI_DEVICE_ERROR;
+ goto Exit;
+ }
}
}
|