On Thu, 2011-11-10 at 11:28 +0200, Arik Nemtsov wrote:
> Allow setting a probe response template for an interface operating in
> AP mode. Low level drivers are notified about changes in the probe
> response template and are able to retrieve a copy of the current probe
> response. This data can, for example, be uploaded to hardware as a
> template.
> +static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
> + u8 *resp, size_t resp_len)
> +{
> + struct sk_buff *new, *old;
> +
> + if (!resp || !resp_len)
> + return -EINVAL;
> +
> + old = sdata->u.ap.probe_resp;
sparse warns here with RCU checking enabled in the kernel:
cfg.c:502:13: warning: incorrect type in assignment (different address spaces)
cfg.c:502:13: expected struct sk_buff *old
cfg.c:502:13: got struct sk_buff [noderef] <asn:4>*probe_resp
Please take a look, ieee80211_set_beacon() uses rtnl_dereference() to
avoid the sparse warning and annotate that the RTNL is used to protect
the pointer.
johannes
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