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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: Ilan Peer <ilan.peer@intel.com>
[replace another occurrence in libertas, fix kernel-doc, fix bugs]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Ilan Peer 2014-01-09 11:37:23 +02:00 committed by Johannes Berg
parent 685328b296
commit bdfbec2d2d
6 changed files with 29 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/net/wireless/libertas/cfg.c
View File

@ -1268,14 +1268,9 @@ static struct cfg80211_scan_request *
_new_connect_scan_req(struct wiphy *wiphy, struct cfg80211_connect_params *sme) _new_connect_scan_req(struct wiphy *wiphy, struct cfg80211_connect_params *sme)
{ {
struct cfg80211_scan_request *creq = NULL; 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; 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) + creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) +
n_channels * sizeof(void *), n_channels * sizeof(void *),
GFP_ATOMIC); GFP_ATOMIC);

8
include/net/cfg80211.h
View File

@ -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); 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. */ /* Logging, debugging and troubleshooting/diagnostic helpers. */
/* wiphy_printk helpers, similar to dev_printk */ /* wiphy_printk helpers, similar to dev_printk */

13
net/wireless/nl80211.c
View File

@ -5285,12 +5285,7 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
goto unlock; goto unlock;
} }
} else { } else {
enum ieee80211_band band; n_channels = ieee80211_get_num_supported_channels(wiphy);
n_channels = 0;
for (band = 0; band < IEEE80211_NUM_BANDS; band++)
if (wiphy->bands[band])
n_channels += wiphy->bands[band]->n_channels;
} }
if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
@ -5498,11 +5493,7 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
if (!n_channels) if (!n_channels)
return -EINVAL; return -EINVAL;
} else { } else {
n_channels = 0; n_channels = ieee80211_get_num_supported_channels(wiphy);
for (band = 0; band < IEEE80211_NUM_BANDS; band++)
if (wiphy->bands[band])
n_channels += wiphy->bands[band]->n_channels;
} }
if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) if (info->attrs[NL80211_ATTR_SCAN_SSIDS])

7
net/wireless/scan.c
View File

@ -1089,11 +1089,8 @@ int cfg80211_wext_siwscan(struct net_device *dev,
/* Determine number of channels, needed to allocate creq */ /* Determine number of channels, needed to allocate creq */
if (wreq && wreq->num_channels) if (wreq && wreq->num_channels)
n_channels = wreq->num_channels; n_channels = wreq->num_channels;
else { else
for (band = 0; band < IEEE80211_NUM_BANDS; band++) n_channels = ieee80211_get_num_supported_channels(wiphy);
if (wiphy->bands[band])
n_channels += wiphy->bands[band]->n_channels;
}
creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) + creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) +
n_channels * sizeof(void *), n_channels * sizeof(void *),

13
net/wireless/sme.c
View File

@ -70,18 +70,11 @@ static int cfg80211_conn_scan(struct wireless_dev *wdev)
if (rdev->scan_req) if (rdev->scan_req)
return -EBUSY; return -EBUSY;
if (wdev->conn->params.channel) { if (wdev->conn->params.channel)
n_channels = 1; n_channels = 1;
} else { else
enum ieee80211_band band; n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
n_channels = 0;
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]) + request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
sizeof(request->channels[0]) * n_channels, sizeof(request->channels[0]) * n_channels,
GFP_KERNEL); GFP_KERNEL);

13
net/wireless/util.c
View File

@ -1481,6 +1481,19 @@ int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
return 0; 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 */ /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
/* Ethernet-II snap header (RFC1042 for most EtherTypes) */ /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
const unsigned char rfc1042_header[] __aligned(2) = const unsigned char rfc1042_header[] __aligned(2) =