diff options
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-debugfs.c | 79 |
1 files changed, 41 insertions, 38 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c index 03006c66a20e..af70229144b3 100644 --- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c +++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c @@ -380,50 +380,53 @@ static ssize_t iwl_dbgfs_channels_read(struct file *file, char __user *user_buf, } supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_2GHZ); - channels = supp_band->channels; + if (supp_band) { + channels = supp_band->channels; - pos += scnprintf(buf + pos, bufsz - pos, - "Displaying %d channels in 2.4GHz band 802.11bg):\n", - supp_band->n_channels); - - for (i = 0; i < supp_band->n_channels; i++) pos += scnprintf(buf + pos, bufsz - pos, - "%d: %ddBm: BSS%s%s, %s.\n", - ieee80211_frequency_to_channel( - channels[i].center_freq), - channels[i].max_power, - channels[i].flags & IEEE80211_CHAN_RADAR ? - " (IEEE 802.11h required)" : "", - ((channels[i].flags & IEEE80211_CHAN_NO_IBSS) - || (channels[i].flags & - IEEE80211_CHAN_RADAR)) ? "" : - ", IBSS", - channels[i].flags & - IEEE80211_CHAN_PASSIVE_SCAN ? - "passive only" : "active/passive"); + "Displaying %d channels in 2.4GHz band 802.11bg):\n", + supp_band->n_channels); + for (i = 0; i < supp_band->n_channels; i++) + pos += scnprintf(buf + pos, bufsz - pos, + "%d: %ddBm: BSS%s%s, %s.\n", + ieee80211_frequency_to_channel( + channels[i].center_freq), + channels[i].max_power, + channels[i].flags & IEEE80211_CHAN_RADAR ? + " (IEEE 802.11h required)" : "", + ((channels[i].flags & IEEE80211_CHAN_NO_IBSS) + || (channels[i].flags & + IEEE80211_CHAN_RADAR)) ? "" : + ", IBSS", + channels[i].flags & + IEEE80211_CHAN_PASSIVE_SCAN ? + "passive only" : "active/passive"); + } supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_5GHZ); - channels = supp_band->channels; + if (supp_band) { + channels = supp_band->channels; - pos += scnprintf(buf + pos, bufsz - pos, - "Displaying %d channels in 5.2GHz band (802.11a)\n", - supp_band->n_channels); - - for (i = 0; i < supp_band->n_channels; i++) pos += scnprintf(buf + pos, bufsz - pos, - "%d: %ddBm: BSS%s%s, %s.\n", - ieee80211_frequency_to_channel( - channels[i].center_freq), - channels[i].max_power, - channels[i].flags & IEEE80211_CHAN_RADAR ? - " (IEEE 802.11h required)" : "", - ((channels[i].flags & IEEE80211_CHAN_NO_IBSS) - || (channels[i].flags & - IEEE80211_CHAN_RADAR)) ? "" : - ", IBSS", - channels[i].flags & - IEEE80211_CHAN_PASSIVE_SCAN ? - "passive only" : "active/passive"); + "Displaying %d channels in 5.2GHz band (802.11a)\n", + supp_band->n_channels); + + for (i = 0; i < supp_band->n_channels; i++) + pos += scnprintf(buf + pos, bufsz - pos, + "%d: %ddBm: BSS%s%s, %s.\n", + ieee80211_frequency_to_channel( + channels[i].center_freq), + channels[i].max_power, + channels[i].flags & IEEE80211_CHAN_RADAR ? + " (IEEE 802.11h required)" : "", + ((channels[i].flags & IEEE80211_CHAN_NO_IBSS) + || (channels[i].flags & + IEEE80211_CHAN_RADAR)) ? "" : + ", IBSS", + channels[i].flags & + IEEE80211_CHAN_PASSIVE_SCAN ? + "passive only" : "active/passive"); + } ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); kfree(buf); return ret; |