[arty] 34574: Patch by Cameron Gutman (aicommander <at> gmail <dot> com) - Reenable spinlocks in MiniIndicateData - Don't raise IRQL when calling MiniDoRequest

Author: arty
Date: Fri Jul 18 06:19:29 2008
New Revision: 34574

URL: http://svn.reactos.org/svn/reactos?rev=34574&view=rev
Log:
Patch by Cameron Gutman (aicommander <at> gmail <dot> com)

- Reenable spinlocks in MiniIndicateData
- Don't raise IRQL when calling MiniDoRequest

Modified:
    trunk/reactos/drivers/network/ndis/ndis/miniport.c
    trunk/reactos/drivers/network/ndis/ndis/protocol.c

Modified: trunk/reactos/drivers/network/ndis/ndis/miniport.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/network/ndis/ndis/m...
==============================================================================
--- trunk/reactos/drivers/network/ndis/ndis/miniport.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/network/ndis/ndis/miniport.c [iso-8859-1] Fri Jul 18 06:19:29 2008
@@ -156,7 +156,7 @@
  *     PacketSize          = Total size of received packet
  */
 {
-  /* KIRQL OldIrql; */
+  KIRQL OldIrql;
   PLIST_ENTRY CurrentEntry;
   PADAPTER_BINDING AdapterBinding;

@@ -166,27 +166,8 @@

MiniDisplayPacket2(HeaderBuffer, HeaderBufferSize, LookaheadBuffer, LookaheadBufferSize);

-  /*
-   * XXX Think about this.  This is probably broken.  Spinlocks are
-   * taken out for now until i comprehend the Right Way to do this.
-   *
-   * This used to acquire the MiniportBlock spinlock and hold it until
-   * just before the call to ReceiveHandler.  It would then release and
-   * subsequently re-acquire the lock.
-   *
-   * I don't see how this does any good, as it would seem he's just
-   * trying to protect the packet list.  If somebody else dequeues
-   * a packet, we are in fact in bad shape, but we don't want to
-   * necessarily call the receive handler at elevated irql either.
-   *
-   * therefore: We *are* going to call the receive handler at high irql
-   * (due to holding the lock) for now, and eventually we have to
-   * figure out another way to protect this packet list.
-   *
-   * UPDATE: this is busted; this results in a recursive lock acquisition.
-   */
-  //NDIS_DbgPrint(MAX_TRACE, ("acquiring miniport block lock\n"));
-  //KeAcquireSpinLock(&Adapter->NdisMiniportBlock.Lock, &OldIrql);
+  NDIS_DbgPrint(MAX_TRACE, ("acquiring miniport block lock\n"));
+  KeAcquireSpinLock(&Adapter->NdisMiniportBlock.Lock, &OldIrql);
     {
       CurrentEntry = Adapter->ProtocolListHead.Flink;
       NDIS_DbgPrint(DEBUG_MINIPORT, ("CurrentEntry = %x\n", CurrentEntry));
@@ -201,8 +182,7 @@
           AdapterBinding = CONTAINING_RECORD(CurrentEntry, ADAPTER_BINDING, AdapterListEntry);
      NDIS_DbgPrint(DEBUG_MINIPORT, ("AdapterBinding = %x\n", AdapterBinding));

-          /* see above */
-          /* KeReleaseSpinLock(&Adapter->NdisMiniportBlock.Lock, OldIrql); */
+          KeReleaseSpinLock(&Adapter->NdisMiniportBlock.Lock, OldIrql);

#ifdef DBG
           if(!AdapterBinding)
@@ -246,13 +226,12 @@
               LookaheadBufferSize,
               PacketSize);

-          /* see above */
-          /* KeAcquireSpinLock(&Adapter->NdisMiniportBlock.Lock, &OldIrql); */
+          KeAcquireSpinLock(&Adapter->NdisMiniportBlock.Lock, &OldIrql);

CurrentEntry = CurrentEntry->Flink;
         }
     }
-  //KeReleaseSpinLock(&Adapter->NdisMiniportBlock.Lock, OldIrql);
+  KeReleaseSpinLock(&Adapter->NdisMiniportBlock.Lock, OldIrql);

NDIS_DbgPrint(MAX_TRACE, ("Leaving.\n"));
 }

Modified: trunk/reactos/drivers/network/ndis/ndis/protocol.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/network/ndis/ndis/p...
==============================================================================
--- trunk/reactos/drivers/network/ndis/ndis/protocol.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/network/ndis/ndis/protocol.c [iso-8859-1] Fri Jul 18 06:19:29 2008
@@ -161,14 +161,10 @@

KeReleaseSpinLock(&Adapter->NdisMiniportBlock.Lock, OldIrql);

-  /* MiniportQueryInformation (called by MiniDoRequest) runs at DISPATCH_LEVEL */
-  /* TODO (?): move the irql raise into MiniDoRequest */
-  KeRaiseIrql(DISPATCH_LEVEL, &OldIrql);
-    {
       NdisStatus = MiniDoRequest(&Adapter->NdisMiniportBlock, NdisRequest);

NDIS_DbgPrint(MAX_TRACE, ("acquiring miniport block lock\n"));
-      KeAcquireSpinLockAtDpcLevel(&Adapter->NdisMiniportBlock.Lock);
+      KeAcquireSpinLock(&Adapter->NdisMiniportBlock.Lock, &OldIrql);
         {
           NDIS_DbgPrint(MAX_TRACE, ("Setting adapter 0x%x to free\n"));
           Adapter->MiniportBusy = FALSE;
@@ -176,9 +172,7 @@
           if (Adapter->WorkQueueHead)
             KeInsertQueueDpc(&Adapter->NdisMiniportBlock.DeferredDpc, NULL, NULL);
         }
-      KeReleaseSpinLockFromDpcLevel(&Adapter->NdisMiniportBlock.Lock);
-    }
-  KeLowerIrql(OldIrql);
+      KeReleaseSpinLock(&Adapter->NdisMiniportBlock.Lock, OldIrql);

return NdisStatus;
 }