[Xen-changelog] [xen-3.1-testing] ioemu: Fix IDE DMA thread race.

["Xen patchbot-3.1-testing" <patchbot-3.1-testing@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1201770720 0
# Node ID df56245d48f51e6cdd2139434af9f835681a92c0
# Parent  d4f63f0d162f801bc284d42e059d8bbb0d552afb
ioemu: Fix IDE DMA thread race.
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
 tools/ioemu/hw/ide.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletion(-)

diff -r d4f63f0d162f -r df56245d48f5 tools/ioemu/hw/ide.c
--- a/tools/ioemu/hw/ide.c      Tue Jan 29 22:09:20 2008 +0000
+++ b/tools/ioemu/hw/ide.c      Thu Jan 31 09:12:00 2008 +0000
@@ -422,7 +422,8 @@ static void *dma_thread_func(void* opaqu
         if (rv != 0) {
             if (read(file_pipes[0], &req, sizeof(req)) == 0)
                 return NULL;
-            dma_thread_loop(req);
+           if (req->status & BM_STATUS_DMAING)
+               dma_thread_loop(req);
         } else {
             if (suspend_requested)  {
                 /* Need to tidy up the DMA thread so that we don't end up 

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