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authorJohannes Berg <johannes@sipsolutions.net>2009-08-21 14:44:45 +0200
committerJohn W. Linville <linville@tuxdriver.com>2009-08-28 20:40:34 +0200
commitea77f12f2cc0f31168f2e0259e65a22202ac4dc2 (patch)
tree8ac1288e1680ae2b6093b4fdca978a4ea86f7e21 /net/mac80211/rx.c
parentcfg80211: clean up properly on interface type change (diff)
downloadlinux-ea77f12f2cc0f31168f2e0259e65a22202ac4dc2.tar.xz
linux-ea77f12f2cc0f31168f2e0259e65a22202ac4dc2.zip
mac80211: remove tasklet enable/disable
Due to the way the tasklets work in mac80211 there's no need to ever disable them. However, we need to clear the pending packets when taking down the last interface because otherwise the tx_pending_tasklet might be queued if the driver mucks with the queues (which it shouldn't). I've had a situation occasionally with ar9170 in which ksoftirq was using 100% CPU time because a disabled tasklet was scheduled, and I think that was due to ar9170 receiving a packet while the tasklet was disabled. That's strange and it really should not do that for other reasons, but there's no need to waste that much CPU time over it, it should just warn instead. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/rx.c')
-rw-r--r--net/mac80211/rx.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index dff2239db6e2..b98f1afbfebf 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2471,6 +2471,15 @@ void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb)
return;
}
+ /*
+ * The same happens when we're not even started,
+ * but that's worth a warning.
+ */
+ if (WARN_ON(!local->started)) {
+ kfree_skb(skb);
+ return;
+ }
+
if (status->flag & RX_FLAG_HT) {
/* rate_idx is MCS index */
if (WARN_ON(status->rate_idx < 0 ||