Commit bdfbec2d authored by Ilan Peer's avatar Ilan Peer Committed by Johannes Berg

cfg80211: Add a function to get the number of supported channels

Add a utility function to get the number of channels supported by
the device, and update the places in the code that need this data.
Signed-off-by: default avatarIlan Peer <ilan.peer@intel.com>
[replace another occurrence in libertas, fix kernel-doc, fix bugs]
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 685328b2
......@@ -1268,14 +1268,9 @@ static struct cfg80211_scan_request *
_new_connect_scan_req(struct wiphy *wiphy, struct cfg80211_connect_params *sme)
{
struct cfg80211_scan_request *creq = NULL;
int i, n_channels = 0;
int i, n_channels = ieee80211_get_num_supported_channels(wiphy);
enum ieee80211_band band;
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
if (wiphy->bands[band])
n_channels += wiphy->bands[band]->n_channels;
}
creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) +
n_channels * sizeof(void *),
GFP_ATOMIC);
......
......@@ -4640,6 +4640,14 @@ void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
*/
void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp);
/**
* ieee80211_get_num_supported_channels - get number of channels device has
* @wiphy: the wiphy
*
* Return: the number of channels supported by the device.
*/
unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy);
/* Logging, debugging and troubleshooting/diagnostic helpers. */
/* wiphy_printk helpers, similar to dev_printk */
......
......@@ -5285,12 +5285,7 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
goto unlock;
}
} else {
enum ieee80211_band band;
n_channels = 0;
for (band = 0; band < IEEE80211_NUM_BANDS; band++)
if (wiphy->bands[band])
n_channels += wiphy->bands[band]->n_channels;
n_channels = ieee80211_get_num_supported_channels(wiphy);
}
if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
......@@ -5498,11 +5493,7 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
if (!n_channels)
return -EINVAL;
} else {
n_channels = 0;
for (band = 0; band < IEEE80211_NUM_BANDS; band++)
if (wiphy->bands[band])
n_channels += wiphy->bands[band]->n_channels;
n_channels = ieee80211_get_num_supported_channels(wiphy);
}
if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
......
......@@ -1089,11 +1089,8 @@ int cfg80211_wext_siwscan(struct net_device *dev,
/* Determine number of channels, needed to allocate creq */
if (wreq && wreq->num_channels)
n_channels = wreq->num_channels;
else {
for (band = 0; band < IEEE80211_NUM_BANDS; band++)
if (wiphy->bands[band])
n_channels += wiphy->bands[band]->n_channels;
}
else
n_channels = ieee80211_get_num_supported_channels(wiphy);
creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) +
n_channels * sizeof(void *),
......
......@@ -70,18 +70,11 @@ static int cfg80211_conn_scan(struct wireless_dev *wdev)
if (rdev->scan_req)
return -EBUSY;
if (wdev->conn->params.channel) {
if (wdev->conn->params.channel)
n_channels = 1;
} else {
enum ieee80211_band band;
n_channels = 0;
else
n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
if (!wdev->wiphy->bands[band])
continue;
n_channels += wdev->wiphy->bands[band]->n_channels;
}
}
request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
sizeof(request->channels[0]) * n_channels,
GFP_KERNEL);
......
......@@ -1481,6 +1481,19 @@ int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
return 0;
}
unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy)
{
enum ieee80211_band band;
unsigned int n_channels = 0;
for (band = 0; band < IEEE80211_NUM_BANDS; band++)
if (wiphy->bands[band])
n_channels += wiphy->bands[band]->n_channels;
return n_channels;
}
EXPORT_SYMBOL(ieee80211_get_num_supported_channels);
/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
const unsigned char rfc1042_header[] __aligned(2) =
......
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