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mac80211: fix sta-info pinning

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When a STA is supposed to be unlinked but is pinned, it still needs
to be unlinked from all structures. Only at the end of the unlink
process should we check for pin status and invalidate the callers
reference if it is pinned. Move the pin status check down.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2008-04-08 13:08:20 +02:00 committed by John W. Linville
parent 4d6141c30a
commit 7d1559f173
1 changed files with 32 additions and 32 deletions
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64
net/mac80211/sta_info.c
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@ -439,8 +439,39 @@ void __sta_info_unlink(struct sta_info **sta)
return;
}
list_del(&(*sta)->list);
if ((*sta)->flags & WLAN_STA_PS) {
(*sta)->flags &= ~WLAN_STA_PS;
if (sdata->bss)
atomic_dec(&sdata->bss->num_sta_ps);
__sta_info_clear_tim_bit(sdata->bss, *sta);
}
local->num_sta--;
if (local->ops->sta_notify) {
if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
sdata = sdata->u.vlan.ap;
local->ops->sta_notify(local_to_hw(local), &sdata->vif,
STA_NOTIFY_REMOVE, (*sta)->addr);
}
if (ieee80211_vif_is_mesh(&sdata->vif)) {
mesh_accept_plinks_update(sdata);
#ifdef CONFIG_MAC80211_MESH
del_timer(&(*sta)->plink_timer);
#endif
}
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
printk(KERN_DEBUG "%s: Removed STA %s\n",
wiphy_name(local->hw.wiphy), print_mac(mbuf, (*sta)->addr));
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
/*
* Also pull caller's reference if the STA is pinned by the
* Finally, pull caller's reference if the STA is pinned by the
* task that is adding the debugfs entries. In that case, we
* leave the STA "to be freed".
*
@ -472,37 +503,6 @@ void __sta_info_unlink(struct sta_info **sta)
*sta = NULL;
return;
}
list_del(&(*sta)->list);
if ((*sta)->flags & WLAN_STA_PS) {
(*sta)->flags &= ~WLAN_STA_PS;
if (sdata->bss)
atomic_dec(&sdata->bss->num_sta_ps);
__sta_info_clear_tim_bit(sdata->bss, *sta);
}
local->num_sta--;
if (local->ops->sta_notify) {
if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
sdata = sdata->u.vlan.ap;
local->ops->sta_notify(local_to_hw(local), &sdata->vif,
STA_NOTIFY_REMOVE, (*sta)->addr);
}
if (ieee80211_vif_is_mesh(&sdata->vif)) {
mesh_accept_plinks_update(sdata);
#ifdef CONFIG_MAC80211_MESH
del_timer(&(*sta)->plink_timer);
#endif
}
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
printk(KERN_DEBUG "%s: Removed STA %s\n",
wiphy_name(local->hw.wiphy), print_mac(mbuf, (*sta)->addr));
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
}
void sta_info_unlink(struct sta_info **sta)