[PATCH 01/10] vl.c: Do not add isa-parallel if it's not present

[Fabiano Rosas]

Currently the isa-parallel driver is always added by default
regardless of the presence of the actual code in the build, which can
lead to a crash:

qemu-system-i386: unknown type 'isa-parallel'
Aborted (core dumped)

Check for the presence of the QOM class and do not include
isa-parallel by default if it's not found.

Signed-off-by: Fabiano Rosas <faro...@suse.de>
---
 softmmu/vl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/softmmu/vl.c b/softmmu/vl.c
index 9177d95d4e..614e6cf66e 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -1269,7 +1269,8 @@ static void qemu_disable_default_devices(void)
     if (!has_defaults || machine_class->no_serial) {
         default_serial = 0;
     }
-    if (!has_defaults || machine_class->no_parallel) {
+    if (!has_defaults || machine_class->no_parallel ||
+        !object_class_by_name("isa-parallel")) {
         default_parallel = 0;
     }
     if (!has_defaults || machine_class->no_floppy) {
-- 
2.35.3