From patchwork Sun Feb 28 08:03:58 2010
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Subject: Serial: DOS Plus regression
From: Roy Tam <roytam@gmail.com>
X-Patchwork-Id: 46484
Message-Id: <473191351002280003y34b9f473m27db1fea2cec1bb8@mail.gmail.com>
To: qemu-devel <qemu-devel@nongnu.org>
Date: Sun, 28 Feb 2010 16:03:58 +0800

The commit in r1049 (serial interrupt fix (Hampa Hug)) prevents
booting Digital Research DOSPlus. Following patch partially reverts
that commit and makes DOSPlus booting in QEMU again.

Sign-off-by: Roy Tam <roytam@gmail.com>

---
case 2:

diff --git a/hw/serial.c b/hw/serial.c
index df67383..cf23aad 100644
--- a/hw/serial.c
+++ b/hw/serial.c
@@ -401,10 +401,6 @@ static void serial_ioport_write(void *opaque,
uint32_t addr, uint32_t val)
                      s->poll_msl = 0;
                 }
             }
-            if (s->lsr & UART_LSR_THRE) {
-                s->thr_ipending = 1;
-                serial_update_irq(s);
-            }
         }
         break;