[janderwald] 59224: [VIDEOPRT] - Check if there is a dma adapter CORE-7181 #comment please retest

Author: janderwald
Date: Sun Jun 16 09:17:29 2013
New Revision: 59224

URL: http://svn.reactos.org/svn/reactos?rev=59224&view=rev
Log:
[VIDEOPRT]
- Check if there is a dma adapter
CORE-7181 #comment please retest

Modified:
    trunk/reactos/win32ss/drivers/videoprt/dma.c

Modified: trunk/reactos/win32ss/drivers/videoprt/dma.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/drivers/videoprt/d…
==============================================================================
--- trunk/reactos/win32ss/drivers/videoprt/dma.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/drivers/videoprt/dma.c	[iso-8859-1] Sun Jun 16 09:17:29 2013
@@ -229,8 +229,11 @@
         return NULL;
     }
 
-    /* sanity check */
-    ASSERT(!IsListEmpty(&DeviceExtension->DmaAdapterList));
+    if (IsListEmpty(&DeviceExtension->DmaAdapterList))
+    {
+        /* no adapter available */
+        return NULL;
+    }
 
     /* grab first dma adapter */
     VpDmaAdapter =
(PVIP_DMA_ADAPTER)CONTAINING_RECORD(DeviceExtension->DmaAdapterList.Flink,
VIP_DMA_ADAPTER, Entry);
@@ -239,7 +242,6 @@
     ASSERT(VpDmaAdapter->HwDeviceExtension == HwDeviceExtension);
     ASSERT(VpDmaAdapter->Adapter != NULL);
     ASSERT(VpDmaAdapter->MapRegisters != 0);
-
 
     /* allocate common buffer */
     Result = VideoPortAllocateCommonBuffer(HwDeviceExtension,
(PVP_DMA_ADAPTER)VpDmaAdapter, DesiredLength, LogicalAddress, CacheEnabled, NULL);