- Clear capacity data buffer before reading it to avoid 0xCCCCCCCC values and manuall...

[reactos.git] / reactos / drivers / storage / class2 / class2.c

diff --git a/reactos/drivers/storage/class2/class2.c b/reactos/drivers/storage/class2/class2.c
index 3689868..abd33b4 100644 (file)
--- a/reactos/drivers/storage/class2/class2.c
+++ b/reactos/drivers/storage/class2/class2.c
@@ -1772,6 +1772,7 @@ ScsiClassReadDriveCapacity(IN PDEVICE_OBJECT DeviceObject)
     }
 
   RtlZeroMemory(&Srb, sizeof(SCSI_REQUEST_BLOCK));
+  RtlZeroMemory(CapacityBuffer, sizeof(READ_CAPACITY_DATA));
 
   Srb.CdbLength = 10;
   Srb.TimeOutValue = DeviceExtension->TimeOutValue;
@@ -1787,6 +1788,7 @@ TryAgain:
                                       FALSE);
   DPRINT("Status: %lx\n", Status);
   DPRINT("Srb: %p\n", &Srb);
+  if (CapacityBuffer->BytesPerBlock == 0) Status = STATUS_NOT_SUPPORTED;
   if (NT_SUCCESS(Status))
     {
       SectorSize = (((PUCHAR)&CapacityBuffer->BytesPerBlock)[0] << 24) |