From 9268f895d522a10f176099218df35bfe9111b7a9 Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Sat, 9 Oct 2010 12:41:31 -0700
Subject: UART: Make the 8250's MCR return a deterministic value.

This change makes the 8250 device return the value it has for the MCR when
read instead of leaving the packet data unmodified/uninitialized. The value
the UART has for the MCR may not be right, but that's a seperate issue that
apparently hasn't caused any problems to date.
---
 src/dev/uart8250.cc | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/dev/uart8250.cc')

diff --git a/src/dev/uart8250.cc b/src/dev/uart8250.cc
index 2bbcf2683..f8bd23311 100644
--- a/src/dev/uart8250.cc
+++ b/src/dev/uart8250.cc
@@ -161,6 +161,7 @@ Uart8250::read(PacketPtr pkt)
             pkt->set(LCR);
             break;
         case 0x4: // Modem Control Register (MCR)
+            pkt->set(MCR);
             break;
         case 0x5: // Line Status Register (LSR)
             uint8_t lsr;
-- 
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