Re: [PATCH v7 5/5] accel: abort if we fail to load the accelerator plugin

[Markus Armbruster <armbru@redhat.com>]

Claudio Fontana <cfontana@suse.de> writes:

> if QEMU is configured with modules enabled, it is possible that the
> load of an accelerator module will fail.
> Abort in this case, relying on module_object_class_by_name to report
> the specific load error if any.
>
> Signed-off-by: Claudio Fontana <cfontana@suse.de>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
>
> [claudio: changed abort() to exit(1)]
> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
>  accel/accel-softmmu.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/accel/accel-softmmu.c b/accel/accel-softmmu.c
> index 67276e4f52..f9cdafb148 100644
> --- a/accel/accel-softmmu.c
> +++ b/accel/accel-softmmu.c
> @@ -66,6 +66,7 @@ void accel_init_ops_interfaces(AccelClass *ac)
>  {
>      const char *ac_name;
>      char *ops_name;
> +    ObjectClass *oc;
>      AccelOpsClass *ops;
>  
>      ac_name = object_class_get_name(OBJECT_CLASS(ac));
> @@ -73,8 +74,13 @@ void accel_init_ops_interfaces(AccelClass *ac)
>  
>      ops_name = g_strdup_printf("%s" ACCEL_OPS_SUFFIX, ac_name);
>      ops = ACCEL_OPS_CLASS(module_object_class_by_name(ops_name));
> +    oc = module_object_class_by_name(ops_name);
> +    if (!oc) {
> +        error_report("fatal: could not load module for type '%s'", ops_name);

I'm not sure the additional error message is worth it.

> +        exit(1);

Commit message claims we abort, but we don't, we terminate
unsuccessfully.  Easy enough to fix :)

> +    }
>      g_free(ops_name);
> -
> +    ops = ACCEL_OPS_CLASS(oc);
>      /*
>       * all accelerators need to define ops, providing at least a mandatory
>       * non-NULL create_vcpu_thread operation.

With the commit message corrected:
Reviewed-by: Markus Armbruster <armbru@redhat.com>