* [Qemu-devel] [5295] Add comment to windows SCSI hack.
@ 2008-09-22 16:30 Paul Brook
0 siblings, 0 replies; only message in thread
From: Paul Brook @ 2008-09-22 16:30 UTC (permalink / raw)
To: qemu-devel
Revision: 5295
http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5295
Author: pbrook
Date: 2008-09-22 16:30:29 +0000 (Mon, 22 Sep 2008)
Log Message:
-----------
Add comment to windows SCSI hack.
Modified Paths:
--------------
trunk/hw/lsi53c895a.c
Modified: trunk/hw/lsi53c895a.c
===================================================================
--- trunk/hw/lsi53c895a.c 2008-09-22 16:29:18 UTC (rev 5294)
+++ trunk/hw/lsi53c895a.c 2008-09-22 16:30:29 UTC (rev 5295)
@@ -1199,6 +1199,11 @@
}
}
if (insn_processed > 10000 && !s->waiting) {
+ /* Some windows drivers make the device spin waiting for a memory
+ location to change. If we have been executed a lot of code then
+ assume this is the case and force an unexpected device disconnect.
+ This is apparently sufficient to beat the drivers into submission.
+ */
if (!(s->sien0 & LSI_SIST0_UDC))
fprintf(stderr, "inf. loop with UDC masked\n");
lsi_script_scsi_interrupt(s, LSI_SIST0_UDC, 0);
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