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ShellPkg: Fix the incorrect behavior when pressing 'shift' key. 

If 'ReadKeyStroke' function return EFI_NOT_READY then skip it.
If the return value is EFI_DEVICE_ERROR clean the currentString buffer.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Pedroa Liu <pedroa.liu@insyde.com>
Reviewed-by: Qiu Shumin <shumin.qiu@intel.com>
This commit is contained in:
Pedroa Liu 2016-05-16 20:48:41 +08:00 committed by Qiu Shumin
parent c28d2e1047
commit b8f3601daa
1 changed files with 6 additions and 0 deletions
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6
ShellPkg/Application/Shell/FileHandleWrappers.c
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@ -422,6 +422,12 @@ FileInterfaceStdInRead(
gBS->WaitForEvent (1, &gST->ConIn->WaitForKey, &EventIndex);
Status = gST->ConIn->ReadKeyStroke (gST->ConIn, &Key);
if (EFI_ERROR (Status)) {
if (Status == EFI_NOT_READY)
continue;
ZeroMem (CurrentString, MaxStr * sizeof(CHAR16));
StringLen = 0;
break;
}