On Fri, 2018-10-19 at 14:42 +0530, Sriram R wrote:
[...]

This looks fine, but I think it would be nice to have some extended
netlink error reporting for at least some of these errors:

> +     dfs_region = reg_get_dfs_region(wiphy);
> +     if (dfs_region == NL80211_DFS_UNSET)
> +             return -EINVAL;
> +
> +     err = nl80211_parse_chandef(rdev, info, &chandef);
> +     if (err)
> +             return err;
> +
> +     err = cfg80211_chandef_dfs_required(wiphy, &chandef, wdev->iftype);
> +     if (err < 0)
> +             return err;
> +
> +     if (err == 0)
> +             return -EINVAL;
> +
> +     /* Do not process this notification if radar is already detected
> +      * by kernel on this channel
> +      */
> +     if (chandef.chan->dfs_state == NL80211_DFS_UNAVAILABLE)
> +             return -EINVAL;

And maybe that last one should just return 0?

johannes

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