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iwlwifi: make sta lock private & BH lock

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Now that the transport has its own locking,
there's no need to have the sta_lock in the
shared data. Also, it can be a BH lock as
it's not used from IRQ handlers.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2012-03-05 11:24:25 -08:00 committed by John W. Linville
parent 015c15e106
commit fa23cb04b3
5 changed files with 88 additions and 115 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

141
drivers/net/wireless/iwlwifi/iwl-agn-sta.c
View File

@ -34,9 +34,10 @@
#include "iwl-agn.h"
#include "iwl-trans.h"
/* priv->shrd->sta_lock must be held */
static int iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
{
lockdep_assert_held(&priv->sta_lock);
if (sta_id >= IWLAGN_STATION_COUNT) {
IWL_ERR(priv, "invalid sta_id %u", sta_id);
return -EINVAL;
@ -64,7 +65,6 @@ static int iwl_process_add_sta_resp(struct iwl_priv *priv,
struct iwl_rx_packet *pkt)
{
u8 sta_id = addsta->sta.sta_id;
unsigned long flags;
int ret = -EIO;
if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
@ -76,7 +76,7 @@ static int iwl_process_add_sta_resp(struct iwl_priv *priv,
IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
sta_id);
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock(&priv->sta_lock);
switch (pkt->u.add_sta.status) {
case ADD_STA_SUCCESS_MSK:
@ -118,7 +118,7 @@ static int iwl_process_add_sta_resp(struct iwl_priv *priv,
priv->stations[sta_id].sta.mode ==
STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
addsta->sta.addr);
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock(&priv->sta_lock);
return ret;
}
@ -317,18 +317,17 @@ int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
const u8 *addr, bool is_ap,
struct ieee80211_sta *sta, u8 *sta_id_r)
{
unsigned long flags_spin;
int ret = 0;
u8 sta_id;
struct iwl_addsta_cmd sta_cmd;
*sta_id_r = 0;
spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
spin_lock_bh(&priv->sta_lock);
sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
if (sta_id == IWL_INVALID_STATION) {
IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
addr);
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
spin_unlock_bh(&priv->sta_lock);
return -EINVAL;
}
@ -340,7 +339,7 @@ int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
IWL_DEBUG_INFO(priv, "STA %d already in process of being "
"added.\n", sta_id);
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
spin_unlock_bh(&priv->sta_lock);
return -EEXIST;
}
@ -348,24 +347,24 @@ int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
"adding again.\n", sta_id, addr);
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
spin_unlock_bh(&priv->sta_lock);
return -EEXIST;
}
priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
memcpy(&sta_cmd, &priv->stations[sta_id].sta,
sizeof(struct iwl_addsta_cmd));
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
spin_unlock_bh(&priv->sta_lock);
/* Add station to device's station table */
ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
if (ret) {
spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
spin_lock_bh(&priv->sta_lock);
IWL_ERR(priv, "Adding station %pM failed.\n",
priv->stations[sta_id].sta.sta.addr);
priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
spin_unlock_bh(&priv->sta_lock);
}
*sta_id_r = sta_id;
return ret;
@ -373,11 +372,11 @@ int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
/**
* iwl_sta_ucode_deactivate - deactivate ucode status for a station
*
* priv->shrd->sta_lock must be held
*/
static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
{
lockdep_assert_held(&priv->sta_lock);
/* Ucode must be active and driver must be non active */
if ((priv->stations[sta_id].used &
(IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) !=
@ -396,8 +395,6 @@ static int iwl_send_remove_station(struct iwl_priv *priv,
{
struct iwl_rx_packet *pkt;
int ret;
unsigned long flags_spin;
struct iwl_rem_sta_cmd rm_sta_cmd;
struct iwl_host_cmd cmd = {
@ -429,11 +426,9 @@ static int iwl_send_remove_station(struct iwl_priv *priv,
switch (pkt->u.rem_sta.status) {
case REM_STA_SUCCESS_MSK:
if (!temporary) {
spin_lock_irqsave(&priv->shrd->sta_lock,
flags_spin);
spin_lock_bh(&priv->sta_lock);
iwl_sta_ucode_deactivate(priv, sta_id);
spin_unlock_irqrestore(&priv->shrd->sta_lock,
flags_spin);
spin_unlock_bh(&priv->sta_lock);
}
IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
break;
@ -454,7 +449,6 @@ static int iwl_send_remove_station(struct iwl_priv *priv,
int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
const u8 *addr)
{
unsigned long flags;
u8 tid;
if (!iwl_is_ready(priv->shrd)) {
@ -475,7 +469,7 @@ int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
if (WARN_ON(sta_id == IWL_INVALID_STATION))
return -EINVAL;
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
@ -505,11 +499,11 @@ int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
if (WARN_ON(priv->num_stations < 0))
priv->num_stations = 0;
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
return iwl_send_remove_station(priv, addr, sta_id, false);
out_err:
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
return -EINVAL;
}
@ -525,12 +519,11 @@ void iwl_clear_ucode_stations(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
int i;
unsigned long flags_spin;
bool cleared = false;
IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
spin_lock_bh(&priv->sta_lock);
for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
if (ctx && ctx->ctxid != priv->stations[i].ctxid)
continue;
@ -542,7 +535,7 @@ void iwl_clear_ucode_stations(struct iwl_priv *priv,
cleared = true;
}
}
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
spin_unlock_bh(&priv->sta_lock);
if (!cleared)
IWL_DEBUG_INFO(priv,
@ -561,7 +554,6 @@ void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
struct iwl_addsta_cmd sta_cmd;
struct iwl_link_quality_cmd lq;
unsigned long flags_spin;
int i;
bool found = false;
int ret;
@ -574,7 +566,7 @@ void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
}
IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
spin_lock_bh(&priv->sta_lock);
for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
if (ctx->ctxid != priv->stations[i].ctxid)
continue;
@ -601,20 +593,17 @@ void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
sizeof(struct iwl_link_quality_cmd));
send_lq = true;
}
spin_unlock_irqrestore(&priv->shrd->sta_lock,
flags_spin);
spin_unlock_bh(&priv->sta_lock);
ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
if (ret) {
spin_lock_irqsave(&priv->shrd->sta_lock,
flags_spin);
spin_lock_bh(&priv->sta_lock);
IWL_ERR(priv, "Adding station %pM failed.\n",
priv->stations[i].sta.sta.addr);
priv->stations[i].used &=
~IWL_STA_DRIVER_ACTIVE;
priv->stations[i].used &=
~IWL_STA_UCODE_INPROGRESS;
spin_unlock_irqrestore(&priv->shrd->sta_lock,
flags_spin);
spin_unlock_bh(&priv->sta_lock);
}
/*
* Rate scaling has already been initialized, send
@ -623,12 +612,12 @@ void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
if (send_lq)
iwl_send_lq_cmd(priv, ctx, &lq,
CMD_SYNC, true);
spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
spin_lock_bh(&priv->sta_lock);
priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
}
}
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
spin_unlock_bh(&priv->sta_lock);
if (!found)
IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
"no stations to be restored.\n");
@ -639,16 +628,15 @@ void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
unsigned long flags;
int sta_id = ctx->ap_sta_id;
int ret;
struct iwl_addsta_cmd sta_cmd;
struct iwl_link_quality_cmd lq;
bool active, have_lq = false;
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
return;
}
@ -661,7 +649,7 @@ void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
active = priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE;
priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
if (active) {
ret = iwl_send_remove_station(
@ -671,9 +659,9 @@ void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
IWL_ERR(priv, "failed to remove STA %pM (%d)\n",
priv->stations[sta_id].sta.sta.addr, ret);
}
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
if (ret)
@ -696,10 +684,9 @@ int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
{
unsigned long flags;
int i;
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
if (!(priv->stations[i].used & IWL_STA_BCAST))
continue;
@ -711,7 +698,7 @@ void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
kfree(priv->stations[i].lq);
priv->stations[i].lq = NULL;
}
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
}
#ifdef CONFIG_IWLWIFI_DEBUG
@ -783,8 +770,6 @@ int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
struct iwl_link_quality_cmd *lq, u8 flags, bool init)
{
int ret = 0;
unsigned long flags_spin;
struct iwl_host_cmd cmd = {
.id = REPLY_TX_LINK_QUALITY_CMD,
.len = { sizeof(struct iwl_link_quality_cmd), },
@ -796,12 +781,12 @@ int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
return -EINVAL;
spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
spin_lock_bh(&priv->sta_lock);
if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
spin_unlock_bh(&priv->sta_lock);
return -EINVAL;
}
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
spin_unlock_bh(&priv->sta_lock);
iwl_dump_lq_cmd(priv, lq);
if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
@ -819,9 +804,9 @@ int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
IWL_DEBUG_INFO(priv, "init LQ command complete, "
"clearing sta addition status for sta %d\n",
lq->sta_id);
spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin);
spin_lock_bh(&priv->sta_lock);
priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin);
spin_unlock_bh(&priv->sta_lock);
}
return ret;
}
@ -906,7 +891,6 @@ int iwlagn_add_bssid_station(struct iwl_priv *priv,
int ret;
u8 sta_id;
struct iwl_link_quality_cmd *link_cmd;
unsigned long flags;
if (sta_id_r)
*sta_id_r = IWL_INVALID_STATION;
@ -920,9 +904,9 @@ int iwlagn_add_bssid_station(struct iwl_priv *priv,
if (sta_id_r)
*sta_id_r = sta_id;
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
priv->stations[sta_id].used |= IWL_STA_LOCAL;
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
/* Set up default rate scaling table in device's station table */
link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
@ -937,9 +921,9 @@ int iwlagn_add_bssid_station(struct iwl_priv *priv,
if (ret)
IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
priv->stations[sta_id].lq = link_cmd;
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
return 0;
}
@ -1100,14 +1084,13 @@ static int iwlagn_send_sta_key(struct iwl_priv *priv,
u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
u32 cmd_flags)
{
unsigned long flags;
__le16 key_flags;
struct iwl_addsta_cmd sta_cmd;
int i;
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
@ -1174,7 +1157,6 @@ int iwl_remove_dynamic_key(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf,
struct ieee80211_sta *sta)
{
unsigned long flags;
struct iwl_addsta_cmd sta_cmd;
u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
__le16 key_flags;
@ -1183,11 +1165,11 @@ int iwl_remove_dynamic_key(struct iwl_priv *priv,
if (sta_id == IWL_INVALID_STATION)
return -ENOENT;
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
sta_id = IWL_INVALID_STATION;
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
if (sta_id == IWL_INVALID_STATION)
return 0;
@ -1287,21 +1269,20 @@ int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
struct iwl_link_quality_cmd *link_cmd;
unsigned long flags;
u8 sta_id;
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
if (sta_id == IWL_INVALID_STATION) {
IWL_ERR(priv, "Unable to prepare broadcast station\n");
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
return -EINVAL;
}
priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
priv->stations[sta_id].used |= IWL_STA_BCAST;
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
if (!link_cmd) {
@ -1310,9 +1291,9 @@ int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
return -ENOMEM;
}
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
priv->stations[sta_id].lq = link_cmd;
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
return 0;
}
@ -1326,7 +1307,6 @@ int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
int iwl_update_bcast_station(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
unsigned long flags;
struct iwl_link_quality_cmd *link_cmd;
u8 sta_id = ctx->bcast_sta_id;
@ -1336,13 +1316,13 @@ int iwl_update_bcast_station(struct iwl_priv *priv,
return -ENOMEM;
}
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
if (priv->stations[sta_id].lq)
kfree(priv->stations[sta_id].lq);
else
IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
priv->stations[sta_id].lq = link_cmd;
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
return 0;
}
@ -1366,18 +1346,17 @@ int iwl_update_bcast_stations(struct iwl_priv *priv)
*/
int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
{
unsigned long flags;
struct iwl_addsta_cmd sta_cmd;
lockdep_assert_held(&priv->shrd->mutex);
/* Remove "disable" flag, to enable Tx for this TID */
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
}
@ -1385,7 +1364,6 @@ int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
int tid, u16 ssn)
{
unsigned long flags;
int sta_id;
struct iwl_addsta_cmd sta_cmd;
@ -1395,14 +1373,14 @@ int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
if (sta_id == IWL_INVALID_STATION)
return -ENXIO;
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
priv->stations[sta_id].sta.station_flags_msk = 0;
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
}
@ -1410,7 +1388,6 @@ int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
int tid)
{
unsigned long flags;
int sta_id;
struct iwl_addsta_cmd sta_cmd;
@ -1422,13 +1399,13 @@ int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
return -ENXIO;
}
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
priv->stations[sta_id].sta.station_flags_msk = 0;
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
}

46
drivers/net/wireless/iwlwifi/iwl-agn-tx.c
View File

@ -370,7 +370,7 @@ int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
info->driver_data[1] = dev_cmd;
/* irqs already disabled/saved above when locking priv->shrd->lock */
spin_lock(&priv->shrd->sta_lock);
spin_lock(&priv->sta_lock);
if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
u8 *qc = NULL;
@ -417,7 +417,7 @@ int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
!ieee80211_has_morefrags(fc))
priv->tid_data[sta_id][tid].seq_number = seq_number;
spin_unlock(&priv->shrd->sta_lock);
spin_unlock(&priv->sta_lock);
spin_unlock_irqrestore(&priv->shrd->lock, flags);
/*
@ -435,7 +435,7 @@ int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
drop_unlock_sta:
if (dev_cmd)
kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
spin_unlock(&priv->shrd->sta_lock);
spin_unlock(&priv->sta_lock);
drop_unlock_priv:
spin_unlock_irqrestore(&priv->shrd->lock, flags);
return -1;
@ -455,7 +455,7 @@ int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
return -ENXIO;
}
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
tid_data = &priv->tid_data[sta_id][tid];
@ -475,7 +475,7 @@ int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
IWL_WARN(priv, "Stopping AGG while state not ON "
"or starting for %d on %d (%d)\n", sta_id, tid,
priv->tid_data[sta_id][tid].agg.state);
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
return 0;
}
@ -489,7 +489,7 @@ int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
tid_data->next_reclaimed);
priv->tid_data[sta_id][tid].agg.state =
IWL_EMPTYING_HW_QUEUE_DELBA;
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
return 0;
}
@ -498,12 +498,10 @@ int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
turn_off:
priv->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF;
/* do not restore/save irqs */
spin_unlock(&priv->shrd->sta_lock);
spin_lock(&priv->shrd->lock);
spin_unlock_bh(&priv->sta_lock);
spin_lock_irqsave(&priv->shrd->lock, flags);
iwl_trans_tx_agg_disable(trans(priv), sta_id, tid);
spin_unlock_irqrestore(&priv->shrd->lock, flags);
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
@ -515,7 +513,6 @@ int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
struct iwl_tid_data *tid_data;
unsigned long flags;
int sta_id;
int ret;
@ -539,7 +536,7 @@ int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
if (ret)
return ret;
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
tid_data = &priv->tid_data[sta_id][tid];
tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
@ -548,7 +545,7 @@ int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
ret = iwl_trans_tx_agg_alloc(trans(priv), sta_id, tid);
if (ret) {
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
return ret;
}
@ -565,7 +562,7 @@ int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
}
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
return ret;
}
@ -575,14 +572,13 @@ int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
{
struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
unsigned long flags;
u16 ssn;
buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
iwl_trans_tx_agg_setup(trans(priv), ctx->ctxid, sta_priv->sta_id, tid,
buf_size, ssn);
@ -638,7 +634,7 @@ static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
struct ieee80211_vif *vif;
u8 *addr;
lockdep_assert_held(&priv->shrd->sta_lock);
lockdep_assert_held(&priv->sta_lock);
addr = priv->stations[sta_id].sta.sta.addr;
ctx = priv->stations[sta_id].ctxid;
@ -1005,7 +1001,6 @@ int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
int sta_id;
int freed;
struct ieee80211_tx_info *info;
unsigned long flags;
struct sk_buff_head skbs;
struct sk_buff *skb;
struct iwl_rxon_context *ctx;
@ -1016,7 +1011,7 @@ int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
IWLAGN_TX_RES_RA_POS;
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock(&priv->sta_lock);
if (is_agg)
iwl_rx_reply_tx_agg(priv, tx_resp);
@ -1106,7 +1101,7 @@ int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
}
iwl_check_abort_status(priv, tx_resp->frame_count, status);
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock(&priv->sta_lock);
return 0;
}
@ -1127,7 +1122,6 @@ int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
struct ieee80211_tx_info *info;
struct ieee80211_hdr *hdr;
struct sk_buff *skb;
unsigned long flags;
int sta_id;
int tid;
int freed;
@ -1149,12 +1143,12 @@ int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
tid = ba_resp->tid;
agg = &priv->tid_data[sta_id][tid].agg;
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock(&priv->sta_lock);
if (unlikely(!agg->wait_for_ba)) {
if (unlikely(ba_resp->bitmap))
IWL_ERR(priv, "Received BA when not expected\n");
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock(&priv->sta_lock);
return 0;
}
@ -1165,7 +1159,7 @@ int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
* transmitted ... if not, it's too late anyway). */
if (iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow,
ba_resp_scd_ssn, 0, &reclaimed_skbs)) {
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock(&priv->sta_lock);
return 0;
}
@ -1230,6 +1224,6 @@ int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
ieee80211_tx_status_irqsafe(priv->hw, skb);
}
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock(&priv->sta_lock);
return 0;
}

7
drivers/net/wireless/iwlwifi/iwl-agn.c
View File

@ -749,10 +749,9 @@ int iwl_alive_start(struct iwl_priv *priv)
*/
static void iwl_clear_driver_stations(struct iwl_priv *priv)
{
unsigned long flags;
struct iwl_rxon_context *ctx;
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
spin_lock_bh(&priv->sta_lock);
memset(priv->stations, 0, sizeof(priv->stations));
priv->num_stations = 0;
@ -770,7 +769,7 @@ static void iwl_clear_driver_stations(struct iwl_priv *priv)
ctx->key_mapping_keys = 0;
}
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
spin_unlock_bh(&priv->sta_lock);
}
void iwl_down(struct iwl_priv *priv)
@ -1039,7 +1038,7 @@ static int iwl_init_drv(struct iwl_priv *priv)
{
int ret;
spin_lock_init(&priv->shrd->sta_lock);
spin_lock_init(&priv->sta_lock);
mutex_init(&priv->shrd->mutex);

6
drivers/net/wireless/iwlwifi/iwl-dev.h
View File

@ -719,6 +719,12 @@ struct iwl_priv {
/*data shared among all the driver's layers */
struct iwl_shared *shrd;
/*
* protects the station table, if shrd->lock and sta_lock are
* needed, shrd->lock must be acquired first
*/
spinlock_t sta_lock;
/* ieee device used by generic ieee processing code */
struct ieee80211_hw *hw;
struct ieee80211_channel *ieee_channels;

3
drivers/net/wireless/iwlwifi/iwl-shared.h
View File

@ -360,8 +360,6 @@ struct iwl_cfg {
* @nic: pointer to the nic data
* @hw_params: see struct iwl_hw_params
* @lock: protect general shared data
* @sta_lock: protects the station table.
* If lock and sta_lock are needed, lock must be acquired first.
* @mutex:
* @wait_command_queue: the wait_queue for SYNC host command nad uCode load
* @eeprom: pointer to the eeprom/OTP image
@ -391,7 +389,6 @@ struct iwl_shared {
struct iwl_hw_params hw_params;
spinlock_t lock;
spinlock_t sta_lock;
struct mutex mutex;
wait_queue_head_t wait_command_queue;