[tfaber] 71128: [USBSTOR] - In USBSTOR_GetMaxLUN, correctly handle devices that do not support this request. Patch by Vadim Galyant. CORE-10515 #resolve

Author: tfaber
Date: Sat Apr  9 16:13:37 2016
New Revision: 71128

URL: http://svn.reactos.org/svn/reactos?rev=71128&view=rev
Log:
[USBSTOR]
- In USBSTOR_GetMaxLUN, correctly handle devices that do not support this request. Patch
by Vadim Galyant.
CORE-10515 #resolve

Modified:
    trunk/reactos/drivers/usb/usbstor/misc.c

Modified: trunk/reactos/drivers/usb/usbstor/misc.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/usb/usbstor/misc.c…
==============================================================================
--- trunk/reactos/drivers/usb/usbstor/misc.c	[iso-8859-1] (original)
+++ trunk/reactos/drivers/usb/usbstor/misc.c	[iso-8859-1] Sat Apr  9 16:13:37 2016
@@ -23,7 +23,7 @@
 NTAPI
 USBSTOR_SyncForwardIrpCompletionRoutine(
     PDEVICE_OBJECT DeviceObject,
-    PIRP Irp, 
+    PIRP Irp,
     PVOID Context)
 {
     if (Irp->PendingReturned)
@@ -362,19 +362,34 @@
 
     DPRINT("MaxLUN: %x\n", *Buffer);
 
-    if (*Buffer > 0xF)
-    {
-        //
-        // invalid response documented in usb mass storage specification
-        //
-        Status = STATUS_DEVICE_DATA_ERROR;
+    if (NT_SUCCESS(Status))
+    {
+        if (*Buffer > 0xF)
+        {
+            //
+            // invalid response documented in usb mass storage specification
+            //
+            Status = STATUS_DEVICE_DATA_ERROR;
+        }
+        else
+        {
+            //
+            // store maxlun
+            //
+            DeviceExtension->MaxLUN = *Buffer;
+        }
     }
     else
     {
         //
-        // store maxlun
-        //
-        DeviceExtension->MaxLUN = *Buffer;
+        // "USB Mass Storage Class. Bulk-Only Transport. Revision 1.0"
+        // 3.2  Get Max LUN (class-specific request) :
+        // Devices that do not support multiple LUNs may STALL this command.
+        //
+        USBSTOR_ResetDevice(DeviceExtension->LowerDeviceObject, DeviceExtension);
+
+        DeviceExtension->MaxLUN = 0;
+        Status = STATUS_SUCCESS;
     }
 
     //