iwlwifi: perform bss_info_changed post association work right away
Do not use workqueue for bss_info_changed post association work.
When driver is notified of association the upper layer will be notified
right after that the association is complete. Doing the post association
work in a workqueue introduces a race condition where the upper layer may
want to make use of the association, but it is not yet complete.
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index 9fb9857..1f34340 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -1840,7 +1840,7 @@
| RXON_FLG_CCK_MSK);
priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
} else {
- /* Copied from iwl4965_bg_post_associate() */
+ /* Copied from iwl4965_post_associate() */
if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
else
@@ -6004,10 +6004,8 @@
#define IWL_DELAY_NEXT_SCAN (HZ*2)
-static void iwl4965_bg_post_associate(struct work_struct *data)
+static void iwl4965_post_associate(struct iwl_priv *priv)
{
- struct iwl_priv *priv = container_of(data, struct iwl_priv,
- post_associate.work);
struct ieee80211_conf *conf = NULL;
int ret = 0;
DECLARE_MAC_BUF(mac);
@@ -6025,12 +6023,10 @@
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
- mutex_lock(&priv->mutex);
- if (!priv->vif || !priv->is_open) {
- mutex_unlock(&priv->mutex);
+ if (!priv->vif || !priv->is_open)
return;
- }
+
iwl4965_scan_cancel_timeout(priv, 200);
conf = ieee80211_get_hw_conf(priv->hw);
@@ -6114,7 +6110,18 @@
/* we have just associated, don't start scan too early */
priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
+}
+
+
+static void iwl4965_bg_post_associate(struct work_struct *data)
+{
+ struct iwl_priv *priv = container_of(data, struct iwl_priv,
+ post_associate.work);
+
+ mutex_lock(&priv->mutex);
+ iwl4965_post_associate(priv);
mutex_unlock(&priv->mutex);
+
}
static void iwl4965_bg_abort_scan(struct work_struct *work)
@@ -6736,6 +6743,10 @@
if (changes & BSS_CHANGED_ASSOC) {
IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
+ /* This should never happen as this function should
+ * never be called from interrupt context. */
+ if (WARN_ON_ONCE(in_interrupt()))
+ return;
if (bss_conf->assoc) {
priv->assoc_id = bss_conf->aid;
priv->beacon_int = bss_conf->beacon_int;
@@ -6743,7 +6754,9 @@
priv->assoc_capability = bss_conf->assoc_capability;
priv->next_scan_jiffies = jiffies +
IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
- queue_work(priv->workqueue, &priv->post_associate.work);
+ mutex_lock(&priv->mutex);
+ iwl4965_post_associate(priv);
+ mutex_unlock(&priv->mutex);
} else {
priv->assoc_id = 0;
IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);