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authorStanislaw Gruszka <sgruszka@redhat.com>2010-02-19 15:47:33 -0800
committerJohn W. Linville <linville@tuxdriver.com>2010-02-22 11:15:50 -0500
commita120e912eb51e347f36c71b60a1d13af74d30e83 (patch)
treed07795748f9ccbd53958f24671fab60eb8c1bf48
parenta239a8b47cc0e5e6d7416a89f340beac06d5edaa (diff)
downloadlwn-a120e912eb51e347f36c71b60a1d13af74d30e83.tar.gz
lwn-a120e912eb51e347f36c71b60a1d13af74d30e83.zip
iwlwifi: sanity check before counting number of tfds can be free
Check the frame control for ieee80211_is_data_qos() is true before counting the number of tfds can be free, the tfds_in_queue only increment when ieee80211_is_data_qos() is true before transmit; so it should only decrement if the type match. Remove ieee80211_is_data_qos check for frame_ctrl in tx_resp to avoid invalid information pass from uCode. Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> CC: stable@kernel.org Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-5000.c6
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-tx.c6
2 files changed, 7 insertions, 5 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c
index f27c514886a5..cffaae772d51 100644
--- a/drivers/net/wireless/iwlwifi/iwl-5000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-5000.c
@@ -1153,16 +1153,14 @@ static void iwl5000_rx_reply_tx(struct iwl_priv *priv,
tx_resp->failure_frame);
freed = iwl_tx_queue_reclaim(priv, txq_id, index);
- if (ieee80211_is_data_qos(tx_resp->frame_ctrl))
- iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
+ iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
if (priv->mac80211_registered &&
(iwl_queue_space(&txq->q) > txq->q.low_mark))
iwl_wake_queue(priv, txq_id);
}
- if (ieee80211_is_data_qos(tx_resp->frame_ctrl))
- iwl_txq_check_empty(priv, sta_id, tid, txq_id);
+ iwl_txq_check_empty(priv, sta_id, tid, txq_id);
if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
IWL_ERR(priv, "TODO: Implement Tx ABORT REQUIRED!!!\n");
diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c
index 72136c8f51da..8f4071562857 100644
--- a/drivers/net/wireless/iwlwifi/iwl-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-tx.c
@@ -1145,6 +1145,7 @@ int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
struct iwl_queue *q = &txq->q;
struct iwl_tx_info *tx_info;
int nfreed = 0;
+ struct ieee80211_hdr *hdr;
if ((index >= q->n_bd) || (iwl_queue_used(q, index) == 0)) {
IWL_ERR(priv, "Read index for DMA queue txq id (%d), index %d, "
@@ -1159,13 +1160,16 @@ int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
tx_info = &txq->txb[txq->q.read_ptr];
iwl_tx_status(priv, tx_info->skb[0]);
+
+ hdr = (struct ieee80211_hdr *)tx_info->skb[0]->data;
+ if (hdr && ieee80211_is_data_qos(hdr->frame_control))
+ nfreed++;
tx_info->skb[0] = NULL;
if (priv->cfg->ops->lib->txq_inval_byte_cnt_tbl)
priv->cfg->ops->lib->txq_inval_byte_cnt_tbl(priv, txq);
priv->cfg->ops->lib->txq_free_tfd(priv, txq);
- nfreed++;
}
return nfreed;
}