[libvirt] [PATCH 23/23] Make usbFreeDevice accept a NULL device

[Osier Yang]

On 2012年12月01日 04:26, Daniel P. Berrange wrote:
> From: "Daniel P. Berrange"<berrange at redhat.com>
>
> Common practice is to accept NULL for all "free" methods
>
> Signed-off-by: Daniel P. Berrange<berrange at redhat.com>
> ---
>   src/util/hostusb.c | 3 +++
>   1 file changed, 3 insertions(+)
>
> diff --git a/src/util/hostusb.c b/src/util/hostusb.c
> index 24f925b..79b04eb 100644
> --- a/src/util/hostusb.c
> +++ b/src/util/hostusb.c
> @@ -355,6 +355,9 @@ usbGetDevice(unsigned int bus,
>   void
>   usbFreeDevice(usbDevice *dev)
>   {
> +    if (!dev)
> +        return;
> +
>       VIR_DEBUG("%s %s: freeing", dev->id, dev->name);
>       VIR_FREE(dev->path);
>       VIR_FREE(dev);

ACK