Dave,
Here is a batch of fixes intended for 2.6.34. Included is a variable
initialization required for some ath9k hardware to function reliably,
some RCU annotation to avoid some warnings in mac80211, and a fix for
a regression relating to 802.11s mesh networking. Also included are
several iwlwifi fixes, include the elimination of an order-4 allocation
during resume, avoidance of a the BUG_ON in the rate scaling routines,
and the elimination of a DMA API warning during module removal.
The iwlwifi patches are a little larger than I would like, but the
fixes seem legitimate and worthwhile to me.
Please let me know if there are problems!
Thanks,
John
---
The following changes since commit fb9e2d887243499b8d28efcf80821c4f6a092395:
Ken Kawasaki (1):
smc91c92_cs: fix the problem of "Unable to find hardware address"
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6.git master
Felix Fietkau (1):
ath9k: fix double calls to ath_radio_enable
Javier Cardona (1):
mac80211: Handle mesh action frames in ieee80211_rx_h_action
Johannes Berg (1):
mac80211: annotate station rcu dereferences
Shanyu Zhao (1):
iwlwifi: use consistent table for tx data collect
Zhu Yi (2):
iwlwifi: fix DMA allocation warnings
iwlwifi: avoid Tx queue memory allocation in interface down
drivers/net/wireless/ath/ath9k/main.c | 3 +-
drivers/net/wireless/iwlwifi/iwl-agn-rs.c | 55 +++++++--------
drivers/net/wireless/iwlwifi/iwl-core.c | 11 ++-
drivers/net/wireless/iwlwifi/iwl-core.h | 5 +-
drivers/net/wireless/iwlwifi/iwl-tx.c | 107 +++++++++++++++++++++++++----
net/mac80211/main.c | 4 +-
net/mac80211/mesh.c | 3 -
net/mac80211/rx.c | 5 ++
net/mac80211/sta_info.c | 20 ++++-
9 files changed, 153 insertions(+), 60 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 67ca4e5..115e1ae 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1532,8 +1532,7 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
all_wiphys_idle = ath9k_all_wiphys_idle(sc);
ath9k_set_wiphy_idle(aphy, idle);
- if (!idle && all_wiphys_idle)
- enable_radio = true;
+ enable_radio = (!idle && all_wiphys_idle);
/*
* After we unlock here its possible another wiphy
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
index 8bf7c20..be00cb3 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
@@ -345,6 +345,17 @@ static inline int get_num_of_ant_from_rate(u32 rate_n_flags)
!!(rate_n_flags & RATE_MCS_ANT_C_MSK);
}
+/*
+ * Static function to get the expected throughput from an iwl_scale_tbl_info
+ * that wraps a NULL pointer check
+ */
+static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index)
+{
+ if (tbl->expected_tpt)
+ return tbl->expected_tpt[rs_index];
+ return 0;
+}
+
/**
* rs_collect_tx_data - Update the success/failure sliding window
*
@@ -352,19 +363,21 @@ static inline int get_num_of_ant_from_rate(u32 rate_n_flags)
* at this rate. window->data contains the bitmask of successful
* packets.
*/
-static int rs_collect_tx_data(struct iwl_rate_scale_data *windows,
- int scale_index, s32 tpt, int attempts,
- int successes)
+static int rs_collect_tx_data(struct iwl_scale_tbl_info *tbl,
+ int scale_index, int attempts, int successes)
{
struct iwl_rate_scale_data *window = NULL;
static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1));
- s32 fail_count;
+ s32 fail_count, tpt;
if (scale_index < 0 || scale_index >= IWL_RATE_COUNT)
return -EINVAL;
/* Select window for current tx bit rate */
- window = &(windows[scale_index]);
+ window = &(tbl->win[scale_index]);
+
+ /* Get expected throughput */
+ tpt = get_expected_tpt(tbl, scale_index);
/*
* Keep track of only the latest 62 tx frame attempts in this rate's
@@ -738,16 +751,6 @@ static bool table_type_matches(struct iwl_scale_tbl_info *a,
return (a->lq_type == b->lq_type) && (a->ant_type == b->ant_type) &&
(a->is_SGI == b->is_SGI);
}
-/*
- * Static function to get the expected throughput from an iwl_scale_tbl_info
- * that wraps a NULL pointer check
- */
-static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index)
-{
- if (tbl->expected_tpt)
- return tbl->expected_tpt[rs_index];
- return 0;
-}
/*
* mac80211 sends us Tx status
@@ -764,12 +767,10 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct iwl_priv *priv = (struct iwl_priv *)priv_r;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- struct iwl_rate_scale_data *window = NULL;
enum mac80211_rate_control_flags mac_flags;
u32 tx_rate;
struct iwl_scale_tbl_info tbl_type;
- struct iwl_scale_tbl_info *curr_tbl, *other_tbl;
- s32 tpt = 0;
+ struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl;
IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n");
@@ -852,7 +853,6 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
IWL_DEBUG_RATE(priv, "Neither active nor search matches tx rate\n");
return;
}
- window = (struct iwl_rate_scale_data *)&(curr_tbl->win[0]);
/*
* Updating the frame history depends on whether packets were
@@ -865,8 +865,7 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags);
rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type,
&rs_index);
- tpt = get_expected_tpt(curr_tbl, rs_index);
- rs_collect_tx_data(window, rs_index, tpt,
+ rs_collect_tx_data(curr_tbl, rs_index,
info->status.ampdu_ack_len,
info->status.ampdu_ack_map);
@@ -896,19 +895,13 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
* table as active/search.
*/
if (table_type_matches(&tbl_type, curr_tbl))
- tpt = get_expected_tpt(curr_tbl, rs_index);
+ tmp_tbl = curr_tbl;
else if (table_type_matches(&tbl_type, other_tbl))
- tpt = get_expected_tpt(other_tbl, rs_index);
+ tmp_tbl = other_tbl;
else
continue;
-
- /* Constants mean 1 transmission, 0 successes */
- if (i < retries)
- rs_collect_tx_data(window, rs_index, tpt, 1,
- 0);
- else
- rs_collect_tx_data(window, rs_index, tpt, 1,
- legacy_success);
+ rs_collect_tx_data(tmp_tbl, rs_index, 1,
+ i < retries ? 0 : legacy_success);
}
/* Update success/fail counts if not searching for new mode */
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index 112149e..894bcb8 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -307,10 +307,13 @@ int iwl_hw_nic_init(struct iwl_priv *priv)
spin_unlock_irqrestore(&priv->lock, flags);
- /* Allocate and init all Tx and Command queues */
- ret = iwl_txq_ctx_reset(priv);
- if (ret)
- return ret;
+ /* Allocate or reset and init all Tx and Command queues */
+ if (!priv->txq) {
+ ret = iwl_txq_ctx_alloc(priv);
+ if (ret)
+ return ret;
+ } else
+ iwl_txq_ctx_reset(priv);
set_bit(STATUS_INIT, &priv->status);
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index 4ef7739..732590f 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -442,7 +442,8 @@ void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb);
/*****************************************************
* TX
******************************************************/
-int iwl_txq_ctx_reset(struct iwl_priv *priv);
+int iwl_txq_ctx_alloc(struct iwl_priv *priv);
+void iwl_txq_ctx_reset(struct iwl_priv *priv);
void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq);
int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
struct iwl_tx_queue *txq,
@@ -456,6 +457,8 @@ void iwl_free_tfds_in_queue(struct iwl_priv *priv,
void iwl_txq_update_write_ptr(struct iwl_priv *priv, struct iwl_tx_queue *txq);
int iwl_tx_queue_init(struct iwl_priv *priv, struct iwl_tx_queue *txq,
int slots_num, u32 txq_id);
+void iwl_tx_queue_reset(struct iwl_priv *priv, struct iwl_tx_queue *txq,
+ int slots_num, u32 txq_id);
void iwl_tx_queue_free(struct iwl_priv *priv, int txq_id);
int iwl_tx_agg_start(struct iwl_priv *priv, const u8 *ra, u16 tid, u16 *ssn);
int iwl_tx_agg_stop(struct iwl_priv *priv , const u8 *ra, u16 tid);
diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c
index 8c12311..343d81a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-tx.c
@@ -193,10 +193,34 @@ void iwl_cmd_queue_free(struct iwl_priv *priv)
struct iwl_queue *q = &txq->q;
struct device *dev = &priv->pci_dev->dev;
int i;
+ bool huge = false;
if (q->n_bd == 0)
return;
+ for (; q->read_ptr != q->write_ptr;
+ q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
+ /* we have no way to tell if it is a huge cmd ATM */
+ i = get_cmd_index(q, q->read_ptr, 0);
+
+ if (txq->meta[i].flags & CMD_SIZE_HUGE) {
+ huge = true;
+ continue;
+ }
+
+ pci_unmap_single(priv->pci_dev,
+ pci_unmap_addr(&txq->meta[i], mapping),
+ pci_unmap_len(&txq->meta[i], len),
+ PCI_DMA_BIDIRECTIONAL);
+ }
+ if (huge) {
+ i = q->n_window;
+ pci_unmap_single(priv->pci_dev,
+ pci_unmap_addr(&txq->meta[i], mapping),
+ pci_unmap_len(&txq->meta[i], len),
+ PCI_DMA_BIDIRECTIONAL);
+ }
+
/* De-alloc array of command/tx buffers */
for (i = 0; i <= TFD_CMD_SLOTS; i++)
kfree(txq->cmd[i]);
@@ -409,6 +433,26 @@ out_free_arrays:
}
EXPORT_SYMBOL(iwl_tx_queue_init);
+void iwl_tx_queue_reset(struct iwl_priv *priv, struct iwl_tx_queue *txq,
+ int slots_num, u32 txq_id)
+{
+ int actual_slots = slots_num;
+
+ if (txq_id == IWL_CMD_QUEUE_NUM)
+ actual_slots++;
+
+ memset(txq->meta, 0, sizeof(struct iwl_cmd_meta) * actual_slots);
+
+ txq->need_update = 0;
+
+ /* Initialize queue's high/low-water marks, and head/tail indexes */
+ iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
+
+ /* Tell device where to find queue */
+ priv->cfg->ops->lib->txq_init(priv, txq);
+}
+EXPORT_SYMBOL(iwl_tx_queue_reset);
+
/**
* iwl_hw_txq_ctx_free - Free TXQ Context
*
@@ -420,8 +464,7 @@ void iwl_hw_txq_ctx_free(struct iwl_priv *priv)
/* Tx queues */
if (priv->txq) {
- for (txq_id = 0; txq_id < priv->hw_params.max_txq_num;
- txq_id++)
+ for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++)
if (txq_id == IWL_CMD_QUEUE_NUM)
iwl_cmd_queue_free(priv);
else
@@ -437,15 +480,15 @@ void iwl_hw_txq_ctx_free(struct iwl_priv *priv)
EXPORT_SYMBOL(iwl_hw_txq_ctx_free);
/**
- * iwl_txq_ctx_reset - Reset TX queue context
- * Destroys all DMA structures and initialize them again
+ * iwl_txq_ctx_alloc - allocate TX queue context
+ * Allocate all Tx DMA structures and initialize them
*
* @param priv
* @return error code
*/
-int iwl_txq_ctx_reset(struct iwl_priv *priv)
+int iwl_txq_ctx_alloc(struct iwl_priv *priv)
{
- int ret = 0;
+ int ret;
int txq_id, slots_num;
unsigned long flags;
@@ -503,8 +546,31 @@ int iwl_txq_ctx_reset(struct iwl_priv *priv)
return ret;
}
+void iwl_txq_ctx_reset(struct iwl_priv *priv)
+{
+ int txq_id, slots_num;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ /* Turn off all Tx DMA fifos */
+ priv->cfg->ops->lib->txq_set_sched(priv, 0);
+
+ /* Tell NIC where to find the "keep warm" buffer */
+ iwl_write_direct32(priv, FH_KW_MEM_ADDR_REG, priv->kw.dma >> 4);
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ /* Alloc and init all Tx queues, including the command queue (#4) */
+ for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) {
+ slots_num = txq_id == IWL_CMD_QUEUE_NUM ?
+ TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
+ iwl_tx_queue_reset(priv, &priv->txq[txq_id], slots_num, txq_id);
+ }
+}
+
/**
- * iwl_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
+ * iwl_txq_ctx_stop - Stop all Tx DMA channels
*/
void iwl_txq_ctx_stop(struct iwl_priv *priv)
{
@@ -524,9 +590,6 @@ void iwl_txq_ctx_stop(struct iwl_priv *priv)
1000);
}
spin_unlock_irqrestore(&priv->lock, flags);
-
- /* Deallocate memory for all Tx queues */
- iwl_hw_txq_ctx_free(priv);
}
EXPORT_SYMBOL(iwl_txq_ctx_stop);
@@ -1049,6 +1112,14 @@ int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
spin_lock_irqsave(&priv->hcmd_lock, flags);
+ /* If this is a huge cmd, mark the huge flag also on the meta.flags
+ * of the _original_ cmd. This is used for DMA mapping clean up.
+ */
+ if (cmd->flags & CMD_SIZE_HUGE) {
+ idx = get_cmd_index(q, q->write_ptr, 0);
+ txq->meta[idx].flags = CMD_SIZE_HUGE;
+ }
+
idx = get_cmd_index(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
out_cmd = txq->cmd[idx];
out_meta = &txq->meta[idx];
@@ -1226,6 +1297,7 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
struct iwl_device_cmd *cmd;
struct iwl_cmd_meta *meta;
+ struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
/* If a Tx command is being handled and it isn't in the actual
* command queue then there a command routing bug has been introduced
@@ -1239,9 +1311,17 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
return;
}
- cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
- cmd = priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
- meta = &priv->txq[IWL_CMD_QUEUE_NUM].meta[cmd_index];
+ /* If this is a huge cmd, clear the huge flag on the meta.flags
+ * of the _original_ cmd. So that iwl_cmd_queue_free won't unmap
+ * the DMA buffer for the scan (huge) command.
+ */
+ if (huge) {
+ cmd_index = get_cmd_index(&txq->q, index, 0);
+ txq->meta[cmd_index].flags = 0;
+ }
+ cmd_index = get_cmd_index(&txq->q, index, huge);
+ cmd = txq->cmd[cmd_index];
+ meta = &txq->meta[cmd_index];
pci_unmap_single(priv->pci_dev,
pci_unmap_addr(meta, mapping),
@@ -1263,6 +1343,7 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
get_cmd_string(cmd->hdr.cmd));
wake_up_interruptible(&priv->wait_command_queue);
}
+ meta->flags = 0;
}
EXPORT_SYMBOL(iwl_tx_cmd_complete);
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 06c33b6..b887e48 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -225,11 +225,11 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
switch (sdata->vif.type) {
case NL80211_IFTYPE_AP:
sdata->vif.bss_conf.enable_beacon =
- !!rcu_dereference(sdata->u.ap.beacon);
+ !!sdata->u.ap.beacon;
break;
case NL80211_IFTYPE_ADHOC:
sdata->vif.bss_conf.enable_beacon =
- !!rcu_dereference(sdata->u.ibss.presp);
+ !!sdata->u.ibss.presp;
break;
case NL80211_IFTYPE_MESH_POINT:
sdata->vif.bss_conf.enable_beacon = true;
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 61080c5..7a6bebc 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -749,9 +749,6 @@ ieee80211_mesh_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
switch (fc & IEEE80211_FCTL_STYPE) {
case IEEE80211_STYPE_ACTION:
- if (skb->len < IEEE80211_MIN_ACTION_SIZE)
- return RX_DROP_MONITOR;
- /* fall through */
case IEEE80211_STYPE_PROBE_RESP:
case IEEE80211_STYPE_BEACON:
skb_queue_tail(&ifmsh->skb_queue, skb);
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index b5c48de..13fcd2d 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1973,6 +1973,11 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
goto handled;
}
break;
+ case MESH_PLINK_CATEGORY:
+ case MESH_PATH_SEL_CATEGORY:
+ if (ieee80211_vif_is_mesh(&sdata->vif))
+ return ieee80211_mesh_rx_mgmt(sdata, rx->skb);
+ break;
}
/*
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 56422d8..fb12cec 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -93,12 +93,18 @@ struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
struct ieee80211_local *local = sdata->local;
struct sta_info *sta;
- sta = rcu_dereference(local->sta_hash[STA_HASH(addr)]);
+ sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)],
+ rcu_read_lock_held() ||
+ lockdep_is_held(&local->sta_lock) ||
+ lockdep_is_held(&local->sta_mtx));
while (sta) {
if (sta->sdata == sdata &&
memcmp(sta->sta.addr, addr, ETH_ALEN) == 0)
break;
- sta = rcu_dereference(sta->hnext);
+ sta = rcu_dereference_check(sta->hnext,
+ rcu_read_lock_held() ||
+ lockdep_is_held(&local->sta_lock) ||
+ lockdep_is_held(&local->sta_mtx));
}
return sta;
}
@@ -113,13 +119,19 @@ struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
struct ieee80211_local *local = sdata->local;
struct sta_info *sta;
- sta = rcu_dereference(local->sta_hash[STA_HASH(addr)]);
+ sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)],
+ rcu_read_lock_held() ||
+ lockdep_is_held(&local->sta_lock) ||
+ lockdep_is_held(&local->sta_mtx));
while (sta) {
if ((sta->sdata == sdata ||
sta->sdata->bss == sdata->bss) &&
memcmp(sta->sta.addr, addr, ETH_ALEN) == 0)
break;
- sta = rcu_dereference(sta->hnext);
+ sta = rcu_dereference_check(sta->hnext,
+ rcu_read_lock_held() ||
+ lockdep_is_held(&local->sta_lock) ||
+ lockdep_is_held(&local->sta_mtx));
}
return sta;
}
--
John W. Linville Someday the world will need a hero, and you
linville@xxxxxxxxxxxxx might be all we have. Be ready.
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