[RTEMS Project] #2838: Termios task driven mode should use mutex for device operations

[RTEMS trac]

#2838: Termios task driven mode should use mutex for device operations
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 Reporter:  sebastian.huber  |      Owner:  sebastian.huber
     Type:  defect           |     Status:  new
 Priority:  normal           |  Milestone:  4.12
Component:  cpukit           |    Version:  4.11
 Severity:  normal           |   Keywords:
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 Termios has a task driven mode (TERMIOS_TASK_DRIVEN). This mode aims to
 avoid long sections with disabled interrupts. This is only partly
 implemented since the device level state is still protected by disabled
 interrupts. Use a mutex to protect the device level state in task driven
 mode to fix this issue.

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Ticket URL: <http://devel.rtems.org/ticket/2838>
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