On 07/31/2014 08:32 PM, arei.gonglei@huawei.com wrote:
> From: Gonglei <arei.gonglei@huawei.com>
> 
> Signed-off-by: Gonglei <arei.gonglei@huawei.com>
> ---
>  hw/usb/dev-audio.c | 2 +-
>  hw/usb/dev-mtp.c   | 4 ++--
>  hw/usb/hcd-ehci.c  | 2 +-
>  3 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/hw/usb/dev-audio.c b/hw/usb/dev-audio.c
> index bfebfe9..988f6cc 100644
> --- a/hw/usb/dev-audio.c
> +++ b/hw/usb/dev-audio.c
> @@ -371,7 +371,7 @@ static void output_callback(void *opaque, int avail)
>              return;
>          }
>          data = streambuf_get(&s->out.buf);
> -        if (NULL == data) {
> +        if (data == NULL) {

Wouldn't it be even more idiomatic as:

if (!data) {

Probably applies throughout your series.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org