[PATCH v5 10/16] hw/char/pl011: Check if receiver is enabled

[Philippe Mathieu-Daudé]

Do not receive characters when UART or receiver are disabled.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/char/pl011.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/hw/char/pl011.c b/hw/char/pl011.c
index c76283dccf..0ce91c13d3 100644
--- a/hw/char/pl011.c
+++ b/hw/char/pl011.c
@@ -85,6 +85,7 @@ DeviceState *pl011_create(hwaddr addr, qemu_irq irq, Chardev 
*chr)
 #define CR_OUT1     (1 << 12)
 #define CR_RTS      (1 << 11)
 #define CR_DTR      (1 << 10)
+#define CR_RXE      (1 << 9)
 #define CR_TXE      (1 << 8)
 #define CR_LBE      (1 << 7)
 #define CR_UARTEN   (1 << 0)
@@ -481,9 +482,11 @@ static void pl011_write(void *opaque, hwaddr offset,
 static int pl011_can_receive(void *opaque)
 {
     PL011State *s = (PL011State *)opaque;
-    int r;
+    int r = 0;
 
-    r = s->read_count < pl011_get_fifo_depth(s);
+    if ((s->cr & CR_UARTEN) && (s->cr & CR_RXE)) {
+        r = s->read_count < pl011_get_fifo_depth(s);
+    }
     trace_pl011_can_receive(s->lcr, s->read_count, r);
     return r;
 }
-- 
2.41.0