[PATCH v2] Fix serial port flushing code.

[Kevin O'Connor]

debug_serial() was doing a full flush while debug_serial_flush() was
only doing a partial flush.  Fix that.

---

Changes from v1 - fix bit math so it actually checks the correct bit.

---
 src/output.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/output.c b/src/output.c
index 5c91ae5..462ffb7 100644
--- a/src/output.c
+++ b/src/output.c
@@ -49,7 +49,7 @@ debug_serial(char c)
     if (!CONFIG_DEBUG_SERIAL)
         return;
     int timeout = DEBUG_TIMEOUT;
-    while ((inb(CONFIG_DEBUG_SERIAL_PORT+SEROFF_LSR) & 0x60) != 0x60)
+    while ((inb(CONFIG_DEBUG_SERIAL_PORT+SEROFF_LSR) & 0x20) != 0x20)
         if (!timeout--)
             // Ran out of time.
             return;
@@ -63,7 +63,7 @@ debug_serial_flush(void)
     if (!CONFIG_DEBUG_SERIAL)
         return;
     int timeout = DEBUG_TIMEOUT;
-    while ((inb(CONFIG_DEBUG_SERIAL_PORT+SEROFF_LSR) & 0x40) != 0x40)
+    while ((inb(CONFIG_DEBUG_SERIAL_PORT+SEROFF_LSR) & 0x60) != 0x60)
         if (!timeout--)
             // Ran out of time.
             return;