[Bug 1564785] [NEW] hw/dma: Print error message only once

[Philipp Hahn]

Public bug reported:

Some Windows VMs triggers qemu-dm to print a log message multiple times
and fills up the log-file with 50 MiB / minute.

It's enough to print the message only once.

The patch was sent upstream but I never got feedback:
<http://lists.xen.org/archives/html/xen-devel/2014-05/msg01209.html>

For reference here the entry in our bug-tracker:
<https://forge.univention.org/bugzilla/show_bug.cgi?id=35488>

** Affects: xen (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: patch

** Patch added: "hw/dma: Print error message only once"
   https://bugs.launchpad.net/bugs/1564785/+attachment/4619232/+files/0052-Bug-35488-hw-dma-Print-error-message-only-once.patch

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Title:
  hw/dma: Print error message only once

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