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[PATCH 4/5] Assert that transmitter not being sent NULL MDL's


  • To: <win-pv-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Martin Harvey <Martin.Harvey@xxxxxxxxxx>
  • Date: Wed, 28 Jul 2021 15:02:46 +0100
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  • Cc: Martin Harvey <Martin.Harvey@xxxxxxxxxx>, Martin Harvey <martin.harvey@xxxxxxxxxx>
  • Delivery-date: Wed, 28 Jul 2021 14:03:46 +0000
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  • List-id: Developer list for the Windows PV Drivers subproject <win-pv-devel.lists.xenproject.org>

An assertion to check that a corresponding fix in XenNet is preventing
NULL MDL's from being queued for transmission.

Signed-off-by: Martin Harvey <martin.harvey@xxxxxxxxxx>
---
 src/xenvif/transmitter.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/xenvif/transmitter.c b/src/xenvif/transmitter.c
index 47f2fc2..b5fb9a8 100644
--- a/src/xenvif/transmitter.c
+++ b/src/xenvif/transmitter.c
@@ -5143,6 +5143,8 @@ TransmitterQueuePacket(
     PXENVIF_TRANSMITTER_RING        Ring;
     NTSTATUS                        status;
 
+    ASSERT(Mdl != NULL);
+
     Frontend = Transmitter->Frontend;
 
     Packet = __TransmitterGetPacket(Transmitter);
-- 
2.25.0.windows.1




 


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