[USBEHCI]

[reactos.git] / drivers / usb / usbehci / usb_device.cpp

diff --git a/drivers/usb/usbehci/usb_device.cpp b/drivers/usb/usbehci/usb_device.cpp
index ea3f89b..b9f4a80 100644 (file)
--- a/drivers/usb/usbehci/usb_device.cpp
+++ b/drivers/usb/usbehci/usb_device.cpp
@@ -1038,27 +1038,40 @@ CUSBDevice::SubmitSetupPacket(
     OUT PVOID Buffer)
 {
     NTSTATUS Status;
-    PMDL Mdl;
+    PMDL Mdl = NULL;
 
-    //
-    // allocate mdl
-    //
-    Mdl = IoAllocateMdl(Buffer, BufferLength, FALSE, FALSE, 0);
+    if (BufferLength)
+    {
+        //
+        // allocate mdl
+        //
+        Mdl = IoAllocateMdl(Buffer, BufferLength, FALSE, FALSE, 0);
+        if (!Mdl)
+        {
+            //
+            // no memory
+            //
+            return STATUS_INSUFFICIENT_RESOURCES;
+        }
 
-    //
-    // HACK HACK HACK: assume the buffer is build from non paged pool
-    //
-    MmBuildMdlForNonPagedPool(Mdl);
+        //
+        // HACK HACK HACK: assume the buffer is build from non paged pool
+        //
+        MmBuildMdlForNonPagedPool(Mdl);
+    }
 
     //
     // commit setup packet
     //
     Status = CommitSetupPacket(SetupPacket, 0, BufferLength, Mdl);
 
-    //
-    // free mdl
-    //
-    IoFreeMdl(Mdl);
+    if (Mdl != NULL)
+    {
+        //
+        // free mdl
+        //
+        IoFreeMdl(Mdl);
+    }
 
     //
     // done