diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2011-05-14 01:55:23 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-05-16 14:25:28 -0400 |
| commit | 8e621fc90b42fa2ca4ff65dd8d9cb21723e47837 (patch) | |
| tree | 39f82d266bb6b6c13f059dbabc46c1621601a542 /net | |
| parent | df64962f7d74877624442c059e7878fdf7ec3c22 (diff) | |
| download | lwn-8e621fc90b42fa2ca4ff65dd8d9cb21723e47837.tar.gz lwn-8e621fc90b42fa2ca4ff65dd8d9cb21723e47837.zip | |
mac80211: verify IBSS in interface combinations
Drivers shouldn't attempt to advertise support
for more than one IBSS interface since mac80211
doesn't support that. Check and return an error
from ieee80211_register_hw() in that case.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/main.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 0d7b08db8e56..96ab1302a099 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -752,11 +752,25 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); - /* mac80211 doesn't support more than 1 channel */ - for (i = 0; i < hw->wiphy->n_iface_combinations; i++) - if (hw->wiphy->iface_combinations[i].num_different_channels > 1) + /* + * mac80211 doesn't support more than 1 channel, and also not more + * than one IBSS interface + */ + for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { + const struct ieee80211_iface_combination *c; + int j; + + c = &hw->wiphy->iface_combinations[i]; + + if (c->num_different_channels > 1) return -EINVAL; + for (j = 0; j < c->n_limits; j++) + if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && + c->limits[j].max > 1) + return -EINVAL; + } + #ifndef CONFIG_MAC80211_MESH /* mesh depends on Kconfig, but drivers should set it if they want */ local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); |