ipw2x00: age scan results on resume

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>

1 files changed, 11 insertions, 1 deletions

diff --git a/drivers/net/wireless/ipw2x00/ipw2100.c b/drivers/net/wireless/ipw2x00/ipw2100.c
index 52b1cf5160f7..3a6d810a7608 100644
--- a/drivers/net/wireless/ipw2x00/ipw2100.c
+++ b/drivers/net/wireless/ipw2x00/ipw2100.c
@@ -1692,7 +1692,13 @@ static int ipw2100_up(struct ipw2100_priv *priv, int deferred)
         u32 lock;
         u32 ord_len = sizeof(lock);
 
-        /* Quite if manually disabled. */
+        /* Age scan list entries found before suspend */
+        if (priv->suspend_time) {
+                ieee80211_networks_age(priv->ieee, priv->suspend_time);
+                priv->suspend_time = 0;
+        }
+
+        /* Quiet if manually disabled. */
         if (priv->status & STATUS_RF_KILL_SW) {
                 IPW_DEBUG_INFO("%s: Radio is disabled by Manual Disable "
                                "switch\n", priv->net_dev->name);
@@ -6415,6 +6421,8 @@ static int ipw2100_suspend(struct pci_dev *pci_dev, pm_message_t state)
         pci_disable_device(pci_dev);
         pci_set_power_state(pci_dev, PCI_D3hot);
 
+        priv->suspend_at = get_seconds();
+
         mutex_unlock(&priv->action_mutex);
 
         return 0;
@@ -6458,6 +6466,8 @@ static int ipw2100_resume(struct pci_dev *pci_dev)
          * the queue of needed */
         netif_device_attach(dev);
 
+        priv->suspend_time = get_seconds() - priv->suspend_at;
+
         /* Bring the device back up */
         if (!(priv->status & STATUS_RF_KILL_SW))
                 ipw2100_up(priv, 0);