[PATCH 13/40] sh,sh-sci: Use NO_POLL_CHAR in the SCIF polled console code

[Jason Wessel]

The sci_poll_get_char() needs to return immediately if there is no
input from the chip to process, and must return a value of
NO_POLL_CHAR.

This allows kgdboc to process multiple polled devices while kgdb is
active.

Signed-off-by: Jason Wessel <jason.wessel@xxxxxxxxxxxxx>
Acked-by: Paul Mundt <lethal@xxxxxxxxxxxx>
---
 drivers/serial/sh-sci.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index 37f0de9..d29b3fe 100644
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -126,7 +126,11 @@ static int sci_poll_get_char(struct uart_port *port)
 			handle_error(port);
 			continue;
 		}
-	} while (!(status & SCxSR_RDxF(port)));
+		break;
+	} while (1);
+
+	if (!(status & SCxSR_RDxF(port)))
+		return NO_POLL_CHAR;
 
 	c = sci_in(port, SCxRDR);
 
-- 
1.6.3.1.9.g95405b

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