[PATCH 2/5] iwlwifi: iwl3945 synchronize interrupt and tasklet for down iwlwifi

[Joonwoo Park]

After disabling interrupts, it's possible irq & tasklet is pending or running
This patch eleminates races for down iwlwifi

Signed-off-by: Joonwoo Park <joonwpark81@xxxxxxxxx>
---
 drivers/net/wireless/iwlwifi/iwl3945-base.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index c97448d..3986aaf 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -6262,6 +6262,10 @@ static void __iwl_down(struct iwl_priv *priv)
 	/* tell the device to stop sending interrupts */
 	iwl_disable_interrupts(priv);
 
+	/* synchronize irq and tasklet */
+	synchronize_irq(priv->pci_dev->irq);
+	tasklet_kill(&priv->irq_tasklet);
+
 	if (priv->mac80211_registered)
 		ieee80211_stop_queues(priv->hw);
 
-- 
1.5.3.rc5

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