On Tue, 2008-06-17 at 23:20 +0200, Michael Buesch wrote:
> On Tuesday 17 June 2008 22:59:52 David Ellingsworth wrote:
> > I ran into this error today from a kernel I built last night based on
> > the latest wireless-testing branch. Correct me if I'm wrong, but it
> > looks to be b43legacy related. I'm a bit new to kernel debugging but
> > can try to provide additional information if instructions on how to do
> > so are provided.
>
> No, this is a mac80211 bug
Can you try the patch below?
johannes
--- everything.orig/net/mac80211/sta_info.h 2008-06-18 10:07:24.000000000
+0200
+++ everything/net/mac80211/sta_info.h 2008-06-18 11:58:32.000000000 +0200
@@ -164,6 +164,7 @@ struct sta_ampdu_mlme {
* @aid: STA's unique AID (1..2007, 0 = not assigned yet),
* only used in AP (and IBSS?) mode
* @flags: STA flags, see &enum ieee80211_sta_info_flags
+ * @flaglock: spinlock for flags accesses
* @ps_tx_buf: buffer of frames to transmit to this station
* when it leaves power saving state
* @tx_filtered: buffer of frames we already tried to transmit
@@ -186,6 +187,7 @@ struct sta_info {
struct rate_control_ref *rate_ctrl;
void *rate_ctrl_priv;
spinlock_t lock;
+ spinlock_t flaglock;
struct ieee80211_ht_info ht_info;
u64 supp_rates[IEEE80211_NUM_BANDS];
u8 addr[ETH_ALEN];
@@ -198,7 +200,10 @@ struct sta_info {
*/
u8 pin_status;
- /* frequently updated information, locked with lock spinlock */
+ /*
+ * frequently updated, locked with own spinlock (flaglock),
+ * use the accessors defined below
+ */
u32 flags;
/*
@@ -293,34 +298,41 @@ static inline enum plink_state sta_plink
static inline void set_sta_flags(struct sta_info *sta, const u32 flags)
{
- spin_lock_bh(&sta->lock);
+ unsigned long irqfl;
+
+ spin_lock_irqsave(&sta->flaglock, irqfl);
sta->flags |= flags;
- spin_unlock_bh(&sta->lock);
+ spin_unlock_irqrestore(&sta->flaglock, irqfl);
}
static inline void clear_sta_flags(struct sta_info *sta, const u32 flags)
{
- spin_lock_bh(&sta->lock);
+ unsigned long irqfl;
+
+ spin_lock_irqsave(&sta->flaglock, irqfl);
sta->flags &= ~flags;
- spin_unlock_bh(&sta->lock);
+ spin_unlock_irqrestore(&sta->flaglock, irqfl);
}
static inline void set_and_clear_sta_flags(struct sta_info *sta,
const u32 set, const u32 clear)
{
- spin_lock_bh(&sta->lock);
+ unsigned long irqfl;
+
+ spin_lock_irqsave(&sta->flaglock, irqfl);
sta->flags |= set;
sta->flags &= ~clear;
- spin_unlock_bh(&sta->lock);
+ spin_unlock_irqrestore(&sta->flaglock, irqfl);
}
static inline u32 test_sta_flags(struct sta_info *sta, const u32 flags)
{
u32 ret;
+ unsigned long irqfl;
- spin_lock_bh(&sta->lock);
+ spin_lock_irqsave(&sta->flaglock, irqfl);
ret = sta->flags & flags;
- spin_unlock_bh(&sta->lock);
+ spin_unlock_irqrestore(&sta->flaglock, irqfl);
return ret;
}
@@ -329,11 +341,12 @@ static inline u32 test_and_clear_sta_fla
const u32 flags)
{
u32 ret;
+ unsigned long irqfl;
- spin_lock_bh(&sta->lock);
+ spin_lock_irqsave(&sta->flaglock, irqfl);
ret = sta->flags & flags;
sta->flags &= ~flags;
- spin_unlock_bh(&sta->lock);
+ spin_unlock_irqrestore(&sta->flaglock, irqfl);
return ret;
}
@@ -341,10 +354,11 @@ static inline u32 test_and_clear_sta_fla
static inline u32 get_sta_flags(struct sta_info *sta)
{
u32 ret;
+ unsigned long irqfl;
- spin_lock_bh(&sta->lock);
+ spin_lock_irqsave(&sta->flaglock, irqfl);
ret = sta->flags;
- spin_unlock_bh(&sta->lock);
+ spin_unlock_irqrestore(&sta->flaglock, irqfl);
return ret;
}
--- everything.orig/net/mac80211/sta_info.c 2008-06-18 11:56:44.000000000
+0200
+++ everything/net/mac80211/sta_info.c 2008-06-18 11:56:58.000000000 +0200
@@ -235,6 +235,7 @@ struct sta_info *sta_info_alloc(struct i
return NULL;
spin_lock_init(&sta->lock);
+ spin_lock_init(&sta->flaglock);
memcpy(sta->addr, addr, ETH_ALEN);
sta->local = local;
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