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Add comment to windows SCSI hack.

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5295 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2008-09-22 16:30:29 +00:00
parent 48d7c50f84
commit 64c68080da
1 changed files with 5 additions and 0 deletions
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5
hw/lsi53c895a.c
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@ -1199,6 +1199,11 @@ again:
} }
} }
if (insn_processed > 10000 && !s->waiting) { 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)) if (!(s->sien0 & LSI_SIST0_UDC))
fprintf(stderr, "inf. loop with UDC masked\n"); fprintf(stderr, "inf. loop with UDC masked\n");
lsi_script_scsi_interrupt(s, LSI_SIST0_UDC, 0); lsi_script_scsi_interrupt(s, LSI_SIST0_UDC, 0);