qemu-char: do not call chr_write directly Make the mux always go through qemu_chr_fe_write, so that we'll get the mutex for the underlying chardev. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>