diff options
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/wext-compat.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c index 5ef82f2ca88..abf6b0a047d 100644 --- a/net/wireless/wext-compat.c +++ b/net/wireless/wext-compat.c @@ -296,22 +296,34 @@ EXPORT_SYMBOL_GPL(cfg80211_wext_siwmlme); struct ieee80211_channel *cfg80211_wext_freq(struct wiphy *wiphy, struct iw_freq *freq) { + struct ieee80211_channel *chan; + int f; + + /* + * Parse frequency - return NULL for auto and + * -EINVAL for impossible things. + */ if (freq->e == 0) { if (freq->m < 0) return NULL; - else - return ieee80211_get_channel(wiphy, - ieee80211_channel_to_frequency(freq->m)); + f = ieee80211_channel_to_frequency(freq->m); } else { int i, div = 1000000; for (i = 0; i < freq->e; i++) div /= 10; - if (div > 0) - return ieee80211_get_channel(wiphy, freq->m / div); - else + if (div <= 0) return ERR_PTR(-EINVAL); + f = freq->m / div; } + /* + * Look up channel struct and return -EINVAL when + * it cannot be found. + */ + chan = ieee80211_get_channel(wiphy, f); + if (!chan) + return ERR_PTR(-EINVAL); + return chan; } EXPORT_SYMBOL_GPL(cfg80211_wext_freq); |