[Qemu-devel] [PATCH 2/2] serial: clear LSR.TEMT when populating the TSR

[Anthony Liguori]

We never actually clear the TEMT (transmit sending register empty) flag when
populating the TSR.  We set the flag, but since it's never cleared, setting it
is sort of pointless..

I found this with a unit test case.

Signed-off-by: Anthony Liguori <address@hidden>
---
 hw/serial.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/hw/serial.c b/hw/serial.c
index b499bca..a421d1e 100644
--- a/hw/serial.c
+++ b/hw/serial.c
@@ -332,6 +332,7 @@ static void serial_xmit(void *opaque)
         } else {
             s->tsr = s->thr;
             s->lsr |= UART_LSR_THRE;
+            s->lsr &= ~UART_LSR_TEMT;
         }
     }
 
-- 
1.7.5.4