Imported Upstream version 2.1.0upstream/2.1.0

1 files changed, 13 insertions, 6 deletions

diff --git a/hw/char/cadence_uart.c b/hw/char/cadence_uart.c
index 1012f1ad6..a5736cbc0 100644
--- a/hw/char/cadence_uart.c
+++ b/hw/char/cadence_uart.c
@@ -175,8 +175,10 @@ static void uart_send_breaks(UartState *s)
 {
     int break_enabled = 1;
 
-    qemu_chr_fe_ioctl(s->chr, CHR_IOCTL_SERIAL_SET_BREAK,
-                               &break_enabled);
+    if (s->chr) {
+        qemu_chr_fe_ioctl(s->chr, CHR_IOCTL_SERIAL_SET_BREAK,
+                                   &break_enabled);
+    }
 }
 
 static void uart_parameters_setup(UartState *s)
@@ -227,7 +229,9 @@ static void uart_parameters_setup(UartState *s)
 
     packet_size += ssp.data_bits + ssp.stop_bits;
     s->char_tx_time = (get_ticks_per_sec() / ssp.speed) * packet_size;
-    qemu_chr_fe_ioctl(s->chr, CHR_IOCTL_SERIAL_SET_PARAMS, &ssp);
+    if (s->chr) {
+        qemu_chr_fe_ioctl(s->chr, CHR_IOCTL_SERIAL_SET_PARAMS, &ssp);
+    }
 }
 
 static int uart_can_receive(void *opaque)
@@ -295,6 +299,7 @@ static gboolean cadence_uart_xmit(GIOChannel *chan, GIOCondition cond,
     /* instant drain the fifo when there's no back-end */
     if (!s->chr) {
         s->tx_count = 0;
+        return FALSE;
     }
 
     if (!s->tx_count) {
@@ -306,7 +311,8 @@ static gboolean cadence_uart_xmit(GIOChannel *chan, GIOCondition cond,
     memmove(s->tx_fifo, s->tx_fifo + ret, s->tx_count);
 
     if (s->tx_count) {
-        int r = qemu_chr_fe_add_watch(s->chr, G_IO_OUT, cadence_uart_xmit, s);
+        int r = qemu_chr_fe_add_watch(s->chr, G_IO_OUT|G_IO_HUP,
+                                      cadence_uart_xmit, s);
         assert(r);
     }
 
@@ -374,7 +380,9 @@ static void uart_read_rx_fifo(UartState *s, uint32_t *c)
         *c = s->rx_fifo[rx_rpos];
         s->rx_count--;
 
-        qemu_chr_accept_input(s->chr);
+        if (s->chr) {
+            qemu_chr_accept_input(s->chr);
+        }
     } else {
         *c = 0;
     }
@@ -504,7 +512,6 @@ static const VMStateDescription vmstate_cadence_uart = {
     .name = "cadence_uart",
     .version_id = 2,
     .minimum_version_id = 2,
-    .minimum_version_id_old = 2,
     .post_load = cadence_uart_post_load,
     .fields = (VMStateField[]) {
         VMSTATE_UINT32_ARRAY(r, UartState, R_MAX),