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cfg80211: age scan results on resume

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Scanned BSS entries are timestamped with jiffies, which doesn't
increment across suspend and hibernate.  On resume, every BSS in the
scan list looks like it was scanned within the last 10 seconds,
irregardless of how long the machine was actually asleep.  Age scan
results on resume with the time spent during sleep so userspace has a
clue how old they really are.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Dan Williams
2009-02-11 17:14:43 -05:00
committed by John W. Linville
parent abd2fdb4c6
commit cb3a8eec0e
3 changed files with 33 additions and 2 deletions
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7
net/wireless/sysfs.c
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@@ -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);