diff --git a/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.c b/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.c
index 613008bde7..a8b6a1c5f1 100644
--- a/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.c
+++ b/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.c
@@ -2,7 +2,7 @@
Implementation of the command set of USB Mass Storage Specification
for Bootability, Revision 1.0.
-Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.
+Copyright (c) 2007 - 2017, Intel Corporation. All rights reserved.
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -630,10 +630,8 @@ UsbBootGetParams (
{
EFI_BLOCK_IO_MEDIA *Media;
EFI_STATUS Status;
- UINT8 CmdSet;
Media = &(UsbMass->BlockIoMedia);
- CmdSet = ((EFI_USB_INTERFACE_DESCRIPTOR *) (UsbMass->Context))->InterfaceSubClass;
Status = UsbBootInquiry (UsbMass);
if (EFI_ERROR (Status)) {
@@ -668,18 +666,9 @@ UsbBootGetParams (
Media->BlockSize = 0x0800;
}
- if ((UsbMass->Pdt != USB_PDT_CDROM) && (CmdSet == USB_MASS_STORE_SCSI)) {
- //
- // ModeSense is required for the device with PDT of 0x00/0x07/0x0E,
- // which is from [MassStorageBootabilitySpec-Page7].
- // ModeSense(10) is useless here, while ModeSense(6) defined in SCSI
- // could get the information of WriteProtected.
- // Since not all device support this command, so skip if fail.
- //
- UsbScsiModeSense (UsbMass);
- }
+ Status = UsbBootDetectMedia (UsbMass);
- return UsbBootReadCapacity (UsbMass);
+ return Status;
}
@@ -710,7 +699,7 @@ UsbBootDetectMedia (
CmdSet = ((EFI_USB_INTERFACE_DESCRIPTOR *) (UsbMass->Context))->InterfaceSubClass;
Status = UsbBootIsUnitReady (UsbMass);
- if (EFI_ERROR (Status)) {
+ if (EFI_ERROR (Status) && (Status != EFI_MEDIA_CHANGED)) {
goto ON_ERROR;
}