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Subject:	[Xen-changelog] [xen-unstable] [HVM] Qemu rtl8139: correct ring-buffer wrapping.
From:	Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>
Date:	Fri, 27 Jul 2007 03:04:50 -0700
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# HG changeset patch
# User Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>
# Date 1184592432 -3600
# Node ID 1158b6115b1413aa5d92ebe5b4ab2640eded40e3
# Parent  a0f90312844d77fc28b4c2f9ccf5fed22cf68581
[HVM] Qemu rtl8139: correct ring-buffer wrapping.
The rx DMA should never overrun when it hits the end of a 64k buffer
Signed-off-by: Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>
---
 tools/ioemu/hw/rtl8139.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -r a0f90312844d -r 1158b6115b14 tools/ioemu/hw/rtl8139.c
--- a/tools/ioemu/hw/rtl8139.c  Mon Jul 16 10:36:52 2007 +0100
+++ b/tools/ioemu/hw/rtl8139.c  Mon Jul 16 14:27:12 2007 +0100
@@ -754,7 +754,7 @@ static void rtl8139_write_buffer(RTL8139
         int wrapped = MOD2(s->RxBufAddr + size, s->RxBufferSize);
 
         /* write packet data */
-        if (wrapped && s->RxBufferSize < 65536 && !rtl8139_RxWrap(s))
+        if (wrapped && !(s->RxBufferSize < 65536 && rtl8139_RxWrap(s)))
         {
             DEBUG_PRINT((">>> RTL8139: rx packet wrapped in buffer at %d\n", 
size-wrapped));
 

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