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| author | John W. Linville <linville@tuxdriver.com> | 2008-05-27 17:01:55 -0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-05-28 16:43:38 -0400 |
| commit | 6f6c218f68e632e4596cae6e6d43658d26a5e0fe (patch) | |
| tree | 8586bdd871c382f673005a669a1c48f23c595782 | |
| parent | 289c79a4bd350e8a25065102563ad1a183d1b402 (diff) | |
| download | linux-6f6c218f68e632e4596cae6e6d43658d26a5e0fe.tar.gz linux-6f6c218f68e632e4596cae6e6d43658d26a5e0fe.tar.bz2 linux-6f6c218f68e632e4596cae6e6d43658d26a5e0fe.zip | |
rtl8180: avoid NULL dereference in max2820_rf_set_channel
The static function max2820_rf_set_channel is called with conf == NULL
within its compilation unit. Originally this defaulted to b/g channel
1, but "cfg80211 API for channels/bitrates, mac80211 and driver
conversion" (commit 8318d78a44d49ac1edf2bdec7299de3617c4232e) mistakenly
dropped this check. This patch minimally restores the expected
behavior.
Reported-by: Colin Lai <colin_sh@163.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/net/wireless/rtl8180_max2820.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/wireless/rtl8180_max2820.c b/drivers/net/wireless/rtl8180_max2820.c index a34dfd382b6d..a140c802264a 100644 --- a/drivers/net/wireless/rtl8180_max2820.c +++ b/drivers/net/wireless/rtl8180_max2820.c @@ -78,7 +78,8 @@ static void max2820_rf_set_channel(struct ieee80211_hw *dev, struct ieee80211_conf *conf) { struct rtl8180_priv *priv = dev->priv; - int channel = ieee80211_frequency_to_channel(conf->channel->center_freq); + int channel = conf ? + ieee80211_frequency_to_channel(conf->channel->center_freq) : 1; unsigned int chan_idx = channel - 1; u32 txpw = priv->channels[chan_idx].hw_value & 0xFF; u32 chan = max2820_chan[chan_idx]; |