Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-12 15:11:50 +00:00
Code Issues Packages Projects Releases Wiki Activity

iwlwifi: more priv->mutex serialization

Browse Source 
Check status bits with mutex taken, because when we wait for mutex
unlock, status can change. Patch should also make remaining sync
commands be send with priv->mutex taken. That will prevent execute
these commands when we are currently reset firmware, what could
possibly cause troubles.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Stanislaw Gruszka 2011-03-31 17:36:27 +02:00 committed by John W. Linville
parent 3598e1774c
commit dc1a4068fc
1 changed files with 21 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
drivers/net/wireless/iwlwifi/iwl-agn.c
View File

@ -483,12 +483,14 @@ static void iwl_bg_bt_full_concurrency(struct work_struct *work)
container_of(work, struct iwl_priv, bt_full_concurrency);
struct iwl_rxon_context *ctx;
mutex_lock(&priv->mutex);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
goto out;
/* dont send host command if rf-kill is on */
if (!iwl_is_ready_rf(priv))
return;
goto out;
IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
priv->bt_full_concurrent ?
@ -498,15 +500,15 @@ static void iwl_bg_bt_full_concurrency(struct work_struct *work)
* LQ & RXON updated cmds must be sent before BT Config cmd
* to avoid 3-wire collisions
*/
mutex_lock(&priv->mutex);
for_each_context(priv, ctx) {
if (priv->cfg->ops->hcmd->set_rxon_chain)
priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
iwlcore_commit_rxon(priv, ctx);
}
mutex_unlock(&priv->mutex);
priv->cfg->ops->hcmd->send_bt_config(priv);
out:
mutex_unlock(&priv->mutex);
}
/**
@ -2620,10 +2622,13 @@ static void iwl_bg_init_alive_start(struct work_struct *data)
struct iwl_priv *priv =
container_of(data, struct iwl_priv, init_alive_start.work);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
mutex_lock(&priv->mutex);
if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
mutex_unlock(&priv->mutex);
return;
}
priv->cfg->ops->lib->init_alive_start(priv);
mutex_unlock(&priv->mutex);
}
@ -2633,15 +2638,16 @@ static void iwl_bg_alive_start(struct work_struct *data)
struct iwl_priv *priv =
container_of(data, struct iwl_priv, alive_start.work);
mutex_lock(&priv->mutex);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
goto unlock;
/* enable dram interrupt */
if (priv->cfg->ops->lib->isr_ops.reset)
priv->cfg->ops->lib->isr_ops.reset(priv);
mutex_lock(&priv->mutex);
iwl_alive_start(priv);
unlock:
mutex_unlock(&priv->mutex);
}
@ -3267,21 +3273,22 @@ void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
IWL_DEBUG_MAC80211(priv, "enter\n");
mutex_lock(&priv->mutex);
if (iwl_is_rfkill(priv))
goto out_exit;
goto out;
if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
test_bit(STATUS_SCANNING, &priv->status))
goto out_exit;
goto out;
if (!iwl_is_associated_ctx(ctx))
goto out_exit;
goto out;
/* channel switch in progress */
if (priv->switch_rxon.switch_in_progress == true)
goto out_exit;
goto out;
mutex_lock(&priv->mutex);
if (priv->cfg->ops->lib->set_channel_switch) {
ch = channel->hw_value;
@ -3337,7 +3344,6 @@ void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
}
out:
mutex_unlock(&priv->mutex);
out_exit:
if (!priv->switch_rxon.switch_in_progress)
ieee80211_chswitch_done(ctx->vif, false);
IWL_DEBUG_MAC80211(priv, "leave\n");