X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=MdeModulePkg%2FBus%2FUsb%2FUsbMassStorageDxe%2FUsbMassBoot.c;h=80fdf470558d3626fb6e64ee5f5a4fbd8167c8d7;hp=980f8b289510854a88f826021d37efd7e98e87cb;hb=e61d30b02a1463387aeea7f28f2ee4870b5fcc8a;hpb=e237e7ae9fc23f32a25040d49cc9a16f2a7f3b4c;ds=sidebyside

diff --git a/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.c b/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.c
index 980f8b2895..80fdf47055 100644
--- a/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.c
+++ b/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.c
@@ -626,7 +626,12 @@ UsbBootDetectMedia (
   EFI_STATUS                Status;
 
   Media    = &UsbMass->BlockIoMedia;
-  OldMedia = UsbMass->BlockIoMedia;
+
+  CopyMem (
+    &OldMedia,
+    &(UsbMass->BlockIoMedia),
+    sizeof (EFI_BLOCK_IO_MEDIA)
+    );
 
   //
   // First test whether the device is ready and get status