epca: Add infinite break support

The EPCA can support indefinte break lengths and with info from digi that
can now be added

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/char/epca.c b/drivers/char/epca.c
index 4998b2761e8f..cf2461d34e5f 100644
--- a/drivers/char/epca.c
+++ b/drivers/char/epca.c
@@ -2477,7 +2477,11 @@ static int pc_send_break(struct tty_struct *tty, int msec)
         unsigned long flags;
 
         if (msec == -1)
-                return -EOPNOTSUPP;
+                msec = 0xFFFF;
+        else if (msec > 0xFFFE)
+                msec = 0xFFFE;
+        else if (msec < 1)
+                msec = 1;
 
         spin_lock_irqsave(&epca_lock, flags);
         globalwinon(ch);