ShellPkg/for: Fix potential null pointer deference

[mirror_edk2.git] / OvmfPkg / VirtioNetDxe / SnpUnsupported.c

/** @file\r
\r
  Empty implementation of the SNP methods that dependent protocols don't\r
  absolutely need and the UEFI-2.3.1+errC specification allows us not to\r
  support.\r
\r
  Copyright (C) 2013, Red Hat, Inc.\r
  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r
\r
  This program and the accompanying materials are licensed and made available\r
  under the terms and conditions of the BSD License which accompanies this\r
  distribution. The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r
  WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include "VirtioNet.h"\r
\r
/**\r
  Resets a network adapter and re-initializes it with the parameters that were\r
  provided in the previous call to Initialize().\r
\r
  @param  This                 The protocol instance pointer.\r
  @param  ExtendedVerification Indicates that the driver may perform a more\r
                               exhaustive verification operation of the device\r
                               during reset.\r
\r
  @retval EFI_SUCCESS           The network interface was reset.\r
  @retval EFI_NOT_STARTED       The network interface has not been started.\r
  @retval EFI_INVALID_PARAMETER One or more of the parameters has an\r
                                unsupported value.\r
  @retval EFI_DEVICE_ERROR      The command could not be sent to the network\r
                                interface.\r
  @retval EFI_UNSUPPORTED       This function is not supported by the network\r
                                interface.\r
\r
**/\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioNetReset (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL *This,\r
  IN BOOLEAN                     ExtendedVerification\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
\r
/**\r
  Modifies or resets the current station address, if supported.\r
\r
  @param  This  The protocol instance pointer.\r
  @param  Reset Flag used to reset the station address to the network\r
                interfaces permanent address.\r
  @param  New   The new station address to be used for the network interface.\r
\r
  @retval EFI_SUCCESS           The network interfaces station address was\r
                                updated.\r
  @retval EFI_NOT_STARTED       The network interface has not been started.\r
  @retval EFI_INVALID_PARAMETER One or more of the parameters has an\r
                                unsupported value.\r
  @retval EFI_DEVICE_ERROR      The command could not be sent to the network\r
                                interface.\r
  @retval EFI_UNSUPPORTED       This function is not supported by the network\r
                                interface.\r
\r
**/\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioNetStationAddress (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL *This,\r
  IN BOOLEAN                     Reset,\r
  IN EFI_MAC_ADDRESS             *New OPTIONAL\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
\r
/**\r
  Resets or collects the statistics on a network interface.\r
\r
  @param  This            Protocol instance pointer.\r
  @param  Reset           Set to TRUE to reset the statistics for the network\r
                          interface.\r
  @param  StatisticsSize  On input the size, in bytes, of StatisticsTable. On\r
                          output the size, in bytes, of the resulting table of\r
                          statistics.\r
  @param  StatisticsTable A pointer to the EFI_NETWORK_STATISTICS structure\r
                          that contains the statistics.\r
\r
  @retval EFI_SUCCESS           The statistics were collected from the network\r
                                interface.\r
  @retval EFI_NOT_STARTED       The network interface has not been started.\r
  @retval EFI_BUFFER_TOO_SMALL  The Statistics buffer was too small. The\r
                                current buffer size needed to hold the\r
                                statistics is returned in StatisticsSize.\r
  @retval EFI_INVALID_PARAMETER One or more of the parameters has an\r
                                unsupported value.\r
  @retval EFI_DEVICE_ERROR      The command could not be sent to the network\r
                                interface.\r
  @retval EFI_UNSUPPORTED       This function is not supported by the network\r
                                interface.\r
\r
**/\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioNetStatistics (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL *This,\r
  IN BOOLEAN                     Reset,\r
  IN OUT UINTN                   *StatisticsSize   OPTIONAL,\r
  OUT EFI_NETWORK_STATISTICS     *StatisticsTable  OPTIONAL\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
\r
/**\r
  Performs read and write operations on the NVRAM device attached to a  network\r
  interface.\r
\r
  @param  This       The protocol instance pointer.\r
  @param  ReadWrite  TRUE for read operations, FALSE for write operations.\r
  @param  Offset     Byte offset in the NVRAM device at which to start the read\r
                     or write operation. This must be a multiple of\r
                     NvRamAccessSize and less than NvRamSize.\r
  @param  BufferSize The number of bytes to read or write from the NVRAM\r
                     device. This must also be a multiple of NvramAccessSize.\r
  @param  Buffer     A pointer to the data buffer.\r
\r
  @retval EFI_SUCCESS           The NVRAM access was performed.\r
  @retval EFI_NOT_STARTED       The network interface has not been started.\r
  @retval EFI_INVALID_PARAMETER One or more of the parameters has an\r
                                unsupported value.\r
  @retval EFI_DEVICE_ERROR      The command could not be sent to the network\r
                                interface.\r
  @retval EFI_UNSUPPORTED       This function is not supported by the network\r
                                interface.\r
\r
**/\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioNetNvData (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL *This,\r
  IN BOOLEAN                     ReadWrite,\r
  IN UINTN                       Offset,\r
  IN UINTN                       BufferSize,\r
  IN OUT VOID                    *Buffer\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r