[Qemu-devel] [RFC][PATCH] qemu_opt_get_bool_helper: back finding desc by name just if !opt->desc

[Tiejun Chen <tiejun.chen@intel.com>]

After one commit 49d2e648e808, "machine: remove qemu_machine_opts
global list", is introduced, QEMU doesn't keep a global list of
options but set desc lately. Then we can see the following,

$ x86_64-softmmu/qemu-system-x86_64 -usb
qemu-system-x86_64: util/qemu-option.c:387: qemu_opt_get_bool_helper: \
    Assertion `opt->desc && opt->desc->type == QEMU_OPT_BOOL' failed.
Aborted (core dumped)

So inside qemu_opt_get_bool_helper, we need to call find_desc_by_name()
to work parse_option_bool() out just in case of !opt->desc.

Signed-off-by: Tiejun Chen <tiejun.chen@intel.com>
---
 util/qemu-option.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/util/qemu-option.c b/util/qemu-option.c
index a708241..7cb3601 100644
--- a/util/qemu-option.c
+++ b/util/qemu-option.c
@@ -377,7 +377,7 @@ static bool qemu_opt_get_bool_helper(QemuOpts *opts, const char *name,
     }
 
     opt = qemu_opt_find(opts, name);
-    if (opt == NULL) {
+    if ((opt == NULL) || !opt->desc)  {
         const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name);
         if (desc && desc->def_value_str) {
             parse_option_bool(name, desc->def_value_str, &ret, &error_abort);
-- 
1.9.1