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-rw-r--r--net/wireless/core.h3
-rw-r--r--net/wireless/scan.c25
-rw-r--r--net/wireless/sysfs.c7
3 files changed, 33 insertions, 2 deletions
diff --git a/net/wireless/core.h b/net/wireless/core.h
index e29ad4cd464f..5d0c682d737a 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -49,6 +49,7 @@ struct cfg80211_registered_device {
struct rb_root bss_tree;
u32 bss_generation;
struct cfg80211_scan_request *scan_req; /* protected by RTNL */
+ unsigned long suspend_at;
/* must be last because of the way we do wiphy_priv(),
* and it should at least be aligned to NETDEV_ALIGN */
@@ -113,5 +114,7 @@ void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby);
void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
+void cfg80211_bss_age(struct cfg80211_registered_device *dev,
+ unsigned long age_secs);
#endif /* __NET_WIRELESS_CORE_H */
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index b1893c863b97..9fad1631d6cb 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -62,6 +62,18 @@ static void bss_release(struct kref *ref)
}
/* must hold dev->bss_lock! */
+void cfg80211_bss_age(struct cfg80211_registered_device *dev,
+ unsigned long age_secs)
+{
+ struct cfg80211_internal_bss *bss;
+ unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC);
+
+ list_for_each_entry(bss, &dev->bss_list, list) {
+ bss->ts -= age_jiffies;
+ }
+}
+
+/* must hold dev->bss_lock! */
void cfg80211_bss_expire(struct cfg80211_registered_device *dev)
{
struct cfg80211_internal_bss *bss, *tmp;
@@ -584,6 +596,15 @@ static void ieee80211_scan_add_ies(struct iw_request_info *info,
}
}
+static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
+{
+ unsigned long end = jiffies;
+
+ if (end >= start)
+ return jiffies_to_msecs(end - start);
+
+ return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1);
+}
static char *
ieee80211_bss(struct iw_request_info *info,
@@ -763,8 +784,8 @@ ieee80211_bss(struct iw_request_info *info,
&iwe, buf);
memset(&iwe, 0, sizeof(iwe));
iwe.cmd = IWEVCUSTOM;
- sprintf(buf, " Last beacon: %dms ago",
- jiffies_to_msecs(jiffies - bss->ts));
+ sprintf(buf, " Last beacon: %ums ago",
+ elapsed_jiffies_msecs(bss->ts));
iwe.u.data.length = strlen(buf);
current_ev = iwe_stream_add_point(info, current_ev,
end_buf, &iwe, buf);
diff --git a/net/wireless/sysfs.c b/net/wireless/sysfs.c
index 26a72b0797a0..15feaeb5ced5 100644
--- a/net/wireless/sysfs.c
+++ b/net/wireless/sysfs.c
@@ -60,6 +60,8 @@ static int wiphy_suspend(struct device *dev, pm_message_t state)
struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
int ret = 0;
+ rdev->suspend_at = get_seconds();
+
if (rdev->ops->suspend) {
rtnl_lock();
ret = rdev->ops->suspend(&rdev->wiphy);
@@ -74,6 +76,11 @@ static int wiphy_resume(struct device *dev)
struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
int ret = 0;
+ /* Age scan results with time spent in suspend */
+ spin_lock_bh(&rdev->bss_lock);
+ cfg80211_bss_age(rdev, get_seconds() - rdev->suspend_at);
+ spin_unlock_bh(&rdev->bss_lock);
+
if (rdev->ops->resume) {
rtnl_lock();
ret = rdev->ops->resume(&rdev->wiphy);