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-rw-r--r--cpukit/libcsupport/src/termios.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/cpukit/libcsupport/src/termios.c b/cpukit/libcsupport/src/termios.c
index 3bc5bb8e1d..d3757df0d4 100644
--- a/cpukit/libcsupport/src/termios.c
+++ b/cpukit/libcsupport/src/termios.c
@@ -275,7 +275,8 @@ drainOutput (struct rtems_termios_tty *tty)
static bool
needDeviceMutex (rtems_termios_tty *tty)
{
- return tty->handler.mode == TERMIOS_TASK_DRIVEN;
+ return tty->handler.mode == TERMIOS_IRQ_SERVER_DRIVEN
+ || tty->handler.mode == TERMIOS_TASK_DRIVEN;
}
static void