diff options
| author | Herton Ronaldo Krzesinski <herton@mandriva.com.br> | 2010-12-13 11:43:51 -0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-12-13 14:55:08 -0500 |
| commit | 8808f64171deec62346888e156e3adb636e2a31a (patch) | |
| tree | 7f34fd8c560b0fdb4426fe4dfcf16029a8ccb3c6 /net/mac80211 | |
| parent | 16cad7fba037b34ca32cc0adac65bc089d969fb8 (diff) | |
| download | lwn-8808f64171deec62346888e156e3adb636e2a31a.tar.gz lwn-8808f64171deec62346888e156e3adb636e2a31a.zip | |
mac80211: avoid calling ieee80211_work_work unconditionally
On suspend, there might be usb wireless drivers which wrongly trigger
the warning in ieee80211_work_work. If an usb driver doesn't have a
suspend hook, the usb stack will disconnect the device. On disconnect,
a mac80211 driver calls ieee80211_unregister_hw, which calls dev_close,
which calls ieee80211_stop, and in the end calls ieee80211_work_purge->
ieee80211_work_work.
The problem is that this call to ieee80211_work_purge comes after
mac80211 is suspended, triggering the warning even when we don't have
work queued in work_list (the expected case when already suspended),
because it always calls ieee80211_work_work.
So, just call ieee80211_work_work in ieee80211_work_purge if we really
have to abort work. This addresses the warning reported at
https://bugzilla.kernel.org/show_bug.cgi?id=24402
Signed-off-by: Herton Ronaldo Krzesinski <herton@mandriva.com.br>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/work.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/mac80211/work.c b/net/mac80211/work.c index ae344d1ba056..146097cb43a7 100644 --- a/net/mac80211/work.c +++ b/net/mac80211/work.c @@ -1051,11 +1051,13 @@ void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata) { struct ieee80211_local *local = sdata->local; struct ieee80211_work *wk; + bool cleanup = false; mutex_lock(&local->mtx); list_for_each_entry(wk, &local->work_list, list) { if (wk->sdata != sdata) continue; + cleanup = true; wk->type = IEEE80211_WORK_ABORT; wk->started = true; wk->timeout = jiffies; @@ -1063,7 +1065,8 @@ void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata) mutex_unlock(&local->mtx); /* run cleanups etc. */ - ieee80211_work_work(&local->work_work); + if (cleanup) + ieee80211_work_work(&local->work_work); mutex_lock(&local->mtx); list_for_each_entry(wk, &local->work_list, list) { |