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mac80211: fix spinlock recursion

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When STAs are expired, we need to hold the sta_lock. Using
the same lock for keys too would then mean we'd need another
key free function, and that'll just lead to confusion, so just
use a new spinlock for all key lists.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
2008-04-11 21:40:35 +02:00
committed by John W. Linville
parent 6b914c5216
commit b16bd15c37
3 changed files with 20 additions and 12 deletions
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10
net/mac80211/ieee80211_i.h
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@@ -600,8 +600,7 @@ struct ieee80211_local {
/*
* The lock only protects the list, hash, timer and counter
* against manipulation, reads are done in RCU. Additionally,
* the lock protects each BSS's TIM bitmap, a few items in
* STA info structures and various key pointers.
* the lock protects each BSS's TIM bitmap.
*/
spinlock_t sta_lock;
unsigned long num_sta;
@@ -635,6 +634,13 @@ struct ieee80211_local {
struct list_head interfaces;
/*
* Key lock, protects sdata's key_list and sta_info's
* key pointers (write access, they're RCU.)
*/
spinlock_t key_lock;
bool sta_sw_scanning;
bool sta_hw_scanning;
int scan_channel_idx;