PROBLEM:  (BCSM90G7C) (PATCH ID: OSF425-919)
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This patch fixes a  hang in the shutdown process ("shutdown now") of a
system
 when a device has flow control switched off.  The shutdown waits for
the flow
control device to become available for write(2).

The patch will open the device in write with non-blocking mode which
will
prevent hanging of the shutdown process.