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[Xen-devel] [Patch] Fix cirrus and rt8139 co-exist issue


  • To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
  • From: "Yang, Xiaowei" <xiaowei.yang@xxxxxxxxx>
  • Date: Mon, 17 Jul 2006 18:36:36 +0800
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Mon, 17 Jul 2006 03:37:08 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcapjOFeexqJGNCER+CAAW2ITkiJLQ==
  • Thread-topic: [Patch] Fix cirrus and rt8139 co-exist issue

Keir,
This patch fixes cirrus and rt8139 co-exist issue in new qemu-dm. The
root cause is that if two MMIO spaces are continuous, qemu may misuse
last MMIO space's read/write to handle current request. 

Thanks,
Xiaowei

Signed-off-by: Yang Xiaowei <xiaowei.yang@xxxxxxxxx>
diff -r ecb8ff1fcf1f tools/ioemu/target-i386-dm/exec-dm.c
--- a/tools/ioemu/target-i386-dm/exec-dm.c      Fri Jul 14 17:53:27 2006
+++ b/tools/ioemu/target-i386-dm/exec-dm.c      Mon Jul 17 17:55:34 2006
@@ -382,7 +385,7 @@
                 start = mmio[i].start;
                 end = mmio[i].start + mmio[i].size;

-                if ((addr >= start) && (addr <= end)){
+                if ((addr >= start) && (addr < end)){
                         return (mmio[i].io_index >> IO_MEM_SHIFT) &
(IO_MEM_NB_ENTRIES - 1);
                 }
         }

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