qemu-char: Call fe_claim / fe_release when not using qdev chr properties

chardev-frontends need to explictly check, increase and decrement the
avail_connections "property" of the chardev when they are not using a
qdev-chardev-property for the chardev.

This fixes things like:
qemu-kvm -chardev stdio,id=foo -device isa-serial,chardev=foo \
  -mon chardev=foo

Working, where they should fail. Most of the changes here are due to
old hardware emulation code which is using serial_hds directly rather then
a qdev-chardev-property.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Message-id: 1364412581-3672-3-git-send-email-hdegoede@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/hw/mcf_uart.c b/hw/mcf_uart.c
index aacf0f05ed..e5de801671 100644
--- a/hw/mcf_uart.c
+++ b/hw/mcf_uart.c
@@ -280,6 +280,7 @@ void *mcf_uart_init(qemu_irq irq, CharDriverState *chr)
     s->chr = chr;
     s->irq = irq;
     if (chr) {
+        qemu_chr_fe_claim_no_fail(chr);
         qemu_chr_add_handlers(chr, mcf_uart_can_receive, mcf_uart_receive,
                               mcf_uart_event, s);
     }