cfg80211: prohibit zero keepalive interval

It's not useful to specify a 0 keepalive interval, this
would send too much data. Prohibit this to also avoid
device issues.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 3acde3f88d3a92226bd34e15bc4a2aabb229649b..a8bd453d22b946cb39e2f65a95996aa92a2a2180 100644 (file)
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -7636,7 +7636,8 @@ static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
                return -EINVAL;
 
        if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
-                       rdev->wiphy.wowlan.tcp->data_interval_max)
+                       rdev->wiphy.wowlan.tcp->data_interval_max ||
+           nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
                return -EINVAL;
 
        wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);