char: make some qemu_chr_fe skip if no driver

In most cases, front ends do not care about the side effect of
CharBackend, so we can simply skip the checks and call the qemu_chr_fe
functions even without associated CharDriver.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-20-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/hw/char/escc.c b/hw/char/escc.c
index 4578a46f10..c71b0a8e56 100644
--- a/hw/char/escc.c
+++ b/hw/char/escc.c
@@ -599,9 +599,7 @@ static uint64_t escc_mem_read(void *opaque, hwaddr addr,
         else
             ret = s->rx;
         trace_escc_mem_readb_data(CHN_C(s), ret);
-        if (s->chr.chr) {
-            qemu_chr_fe_accept_input(&s->chr);
-        }
+        qemu_chr_fe_accept_input(&s->chr);
         return ret;
     default:
         break;