diff options
| -rw-r--r-- | ShellPkg/Library/UefiShellLevel2CommandsLib/Map.c | 54 |
1 files changed, 53 insertions, 1 deletions
diff --git a/ShellPkg/Library/UefiShellLevel2CommandsLib/Map.c b/ShellPkg/Library/UefiShellLevel2CommandsLib/Map.c index 20eb528fa3..3f5925f507 100644 --- a/ShellPkg/Library/UefiShellLevel2CommandsLib/Map.c +++ b/ShellPkg/Library/UefiShellLevel2CommandsLib/Map.c @@ -1,7 +1,7 @@ /** @file
Main file for map shell level 2 command.
- Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2009 - 2017, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2013-2015 Hewlett-Packard Development Company, L.P.<BR>
(C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
@@ -980,6 +980,57 @@ STATIC CONST SHELL_PARAM_ITEM MapParamList[] = { };
/**
+ The routine issues dummy read for every physical block device to cause
+ the BlockIo re-installed if media change happened.
+**/
+VOID
+ProbeForMediaChange (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ UINTN HandleCount;
+ EFI_HANDLE *Handles;
+ EFI_BLOCK_IO_PROTOCOL *BlockIo;
+ UINTN Index;
+
+ gBS->LocateHandleBuffer (
+ ByProtocol,
+ &gEfiBlockIoProtocolGuid,
+ NULL,
+ &HandleCount,
+ &Handles
+ );
+ //
+ // Probe for media change for every physical block io
+ //
+ for (Index = 0; Index < HandleCount; Index++) {
+ Status = gBS->HandleProtocol (
+ Handles[Index],
+ &gEfiBlockIoProtocolGuid,
+ (VOID **) &BlockIo
+ );
+ if (!EFI_ERROR (Status)) {
+ if (!BlockIo->Media->LogicalPartition) {
+ //
+ // Per spec:
+ // The function (ReadBlocks) must return EFI_NO_MEDIA or
+ // EFI_MEDIA_CHANGED even if LBA, BufferSize, or Buffer are invalid so the caller can probe
+ // for changes in media state.
+ //
+ BlockIo->ReadBlocks (
+ BlockIo,
+ BlockIo->Media->MediaId,
+ 0,
+ 0,
+ NULL
+ );
+ }
+ }
+ }
+}
+
+/**
Function for 'map' command.
@param[in] ImageHandle Handle to the Image (NULL if Internal).
@@ -1087,6 +1138,7 @@ ShellCommandRunMap ( || ShellCommandLineGetFlag(Package, L"-u")
|| ShellCommandLineGetFlag(Package, L"-t")
){
+ ProbeForMediaChange ();
if ( ShellCommandLineGetFlag(Package, L"-r")) {
//
// Do the reset
|