Re: [Qemu-devel] [PATCH 1/4] qdev: support to get a device firmware path directly

[Paolo Bonzini <pbonzini@redhat.com>]

On 19/01/2015 14:23, arei.gonglei@huawei.com wrote:
> @@ -780,6 +788,12 @@ static int qdev_get_fw_dev_path_helper(DeviceState *dev, char *p, int size)
>              d = bus_get_fw_dev_path(dev->parent_bus, dev);
>          }
>          if (d) {
> +            l += snprintf(p + l, size - l, "%s/", d);
> +            g_free(d);
> +        }
> +
> +        d = qdev_get_own_fw_dev_path_from_handler(dev->parent_bus, dev);

This changes preexisting behavior.  If d was true, you wouldn't go down
the following else.  Now it does.

I was thinking it should be handled though the "suffix" argument to
add_boot_device_path, but that's harder now that the suffix has to be
passed to device_add_bootindex_property.

Perhaps you could call qdev_get_own_fw_dev_path_from_handler in
get_boot_devices_list, and convert non-NULL suffixes to implementations
of FWPathProvider?

Paolo

> +        if (d) {
>              l += snprintf(p + l, size - l, "%s", d);
>              g_free(d);
>          } else {