diff options
| author | Reinette Chatre <reinette.chatre@intel.com> | 2010-05-05 13:26:06 +0400 |
|---|---|---|
| committer | Reinette Chatre <reinette.chatre@intel.com> | 2010-05-13 21:44:16 +0400 |
| commit | 9c5ac091b269912cd30fade987f4bc615ef3be90 (patch) | |
| tree | 698fe77ad1f144ca1c2e3ba9738946a22253399f /drivers/net/wireless/iwlwifi/iwl-4965.c | |
| parent | 94adfaa406420ae035b1b760e3d5015775fe7b7c (diff) | |
| download | linux-9c5ac091b269912cd30fade987f4bc615ef3be90.tar.xz | |
iwlwifi: fix and add missing sta_lock usage
There are a few places where sta_lock is used, but the
station information protected by it is accessed outside
of the lock. Address this in two ways, if the access
won't sleep then just move the access into the lock, if
the access can sleep then copy the needed station
information to the stack to be accessed without risk of
it changing while access in progress.
Additionally, a number of other places access station
station information without holding the sta_lock, fix
those as well.
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-4965.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-4965.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c index 03b066c7aa3c..ad4d7d11c3b8 100644 --- a/drivers/net/wireless/iwlwifi/iwl-4965.c +++ b/drivers/net/wireless/iwlwifi/iwl-4965.c @@ -2026,6 +2026,7 @@ static void iwl4965_rx_reply_tx(struct iwl_priv *priv, int sta_id; int freed; u8 *qc = NULL; + unsigned long flags; if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) { IWL_ERR(priv, "Read index for DMA queue txq_id (%d) index %d " @@ -2050,10 +2051,10 @@ static void iwl4965_rx_reply_tx(struct iwl_priv *priv, return; } + spin_lock_irqsave(&priv->sta_lock, flags); if (txq->sched_retry) { const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp); struct iwl_ht_agg *agg = NULL; - WARN_ON(!qc); agg = &priv->stations[sta_id].tid[tid].agg; @@ -2110,6 +2111,8 @@ static void iwl4965_rx_reply_tx(struct iwl_priv *priv, iwlagn_txq_check_empty(priv, sta_id, tid, txq_id); iwl_check_abort_status(priv, tx_resp->frame_count, status); + + spin_unlock_irqrestore(&priv->sta_lock, flags); } static int iwl4965_calc_rssi(struct iwl_priv *priv, |