From a269913c52ad37952a4d9953bb6d748f7299c304 Mon Sep 17 00:00:00 2001 From: Larry Finger Date: Sun, 24 Mar 2013 22:06:41 -0500 Subject: [PATCH] rtlwifi: Rework rtl_lps_leave() and rtl_lps_enter() to use work queue In commit a5ffbe0, some of the calls to rtl_lps_leave() were switched to be called from a work queue to avoid a scheduling while atomic bug. This patch converts the remaining calls to use the work queue. In addition, the call to rtl_lps_enter() is also switched to the work queue. None of these newly converted calls had triggered the bug (yet), but this change make all of them fit a single pattern. Signed-off-by: Larry Finger Cc: jcheung@suse.com Cc: machen@suse.com Cc: mmarek@suse.cz Cc: zhiyuan_yang@realsil.com.cn Cc: page_he@realsil.com.cn Signed-off-by: John W. Linville --- drivers/net/wireless/rtlwifi/base.c | 19 +++++++++---------- drivers/net/wireless/rtlwifi/core.c | 9 ++++++--- drivers/net/wireless/rtlwifi/pci.c | 27 +++++++++++++++++---------- drivers/net/wireless/rtlwifi/wifi.h | 3 ++- 4 files changed, 34 insertions(+), 24 deletions(-) diff --git a/drivers/net/wireless/rtlwifi/base.c b/drivers/net/wireless/rtlwifi/base.c index 270b27a06905..f8a2d9f28e46 100644 --- a/drivers/net/wireless/rtlwifi/base.c +++ b/drivers/net/wireless/rtlwifi/base.c @@ -1088,8 +1088,9 @@ u8 rtl_is_special_data(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx) is_tx ? "Tx" : "Rx"); if (is_tx) { + rtlpriv->enter_ps = false; schedule_work(&rtlpriv-> - works.lps_leave_work); + works.lps_change_work); ppsc->last_delaylps_stamp_jiffies = jiffies; } @@ -1099,7 +1100,8 @@ u8 rtl_is_special_data(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx) } } else if (ETH_P_ARP == ether_type) { if (is_tx) { - schedule_work(&rtlpriv->works.lps_leave_work); + rtlpriv->enter_ps = false; + schedule_work(&rtlpriv->works.lps_change_work); ppsc->last_delaylps_stamp_jiffies = jiffies; } @@ -1109,7 +1111,8 @@ u8 rtl_is_special_data(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx) "802.1X %s EAPOL pkt!!\n", is_tx ? "Tx" : "Rx"); if (is_tx) { - schedule_work(&rtlpriv->works.lps_leave_work); + rtlpriv->enter_ps = false; + schedule_work(&rtlpriv->works.lps_change_work); ppsc->last_delaylps_stamp_jiffies = jiffies; } @@ -1318,7 +1321,6 @@ void rtl_watchdog_wq_callback(void *data) u32 aver_tx_cnt_inperiod = 0; u32 aver_tidtx_inperiod[MAX_TID_COUNT] = {0}; u32 tidtx_inp4eriod[MAX_TID_COUNT] = {0}; - bool enter_ps = false; if (is_hal_stop(rtlhal)) return; @@ -1400,15 +1402,12 @@ void rtl_watchdog_wq_callback(void *data) if (((rtlpriv->link_info.num_rx_inperiod + rtlpriv->link_info.num_tx_inperiod) > 8) || (rtlpriv->link_info.num_rx_inperiod > 2)) - enter_ps = false; + rtlpriv->enter_ps = true; else - enter_ps = true; + rtlpriv->enter_ps = false; /* LeisurePS only work in infra mode. */ - if (enter_ps) - rtl_lps_enter(hw); - else - schedule_work(&rtlpriv->works.lps_leave_work); + schedule_work(&rtlpriv->works.lps_change_work); } rtlpriv->link_info.num_rx_inperiod = 0; diff --git a/drivers/net/wireless/rtlwifi/core.c b/drivers/net/wireless/rtlwifi/core.c index 3338cf311062..2201b5cee08f 100644 --- a/drivers/net/wireless/rtlwifi/core.c +++ b/drivers/net/wireless/rtlwifi/core.c @@ -742,8 +742,10 @@ static void rtl_op_bss_info_changed(struct ieee80211_hw *hw, RT_TRACE(rtlpriv, COMP_MAC80211, DBG_DMESG, "BSS_CHANGED_ASSOC\n"); } else { - if (mac->link_state == MAC80211_LINKED) - schedule_work(&rtlpriv->works.lps_leave_work); + if (mac->link_state == MAC80211_LINKED) { + rtlpriv->enter_ps = false; + schedule_work(&rtlpriv->works.lps_change_work); + } if (ppsc->p2p_ps_info.p2p_ps_mode > P2P_PS_NONE) rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE); @@ -1018,7 +1020,8 @@ static void rtl_op_sw_scan_start(struct ieee80211_hw *hw) rtlpriv->cfg->ops->chk_switch_dmdp(hw); } if (mac->link_state == MAC80211_LINKED) { - schedule_work(&rtlpriv->works.lps_leave_work); + rtlpriv->enter_ps = false; + schedule_work(&rtlpriv->works.lps_change_work); mac->link_state = MAC80211_LINKED_SCANNING; } else { rtl_ips_nic_on(hw); diff --git a/drivers/net/wireless/rtlwifi/pci.c b/drivers/net/wireless/rtlwifi/pci.c index 4af6abd1491c..b449d41a3084 100644 --- a/drivers/net/wireless/rtlwifi/pci.c +++ b/drivers/net/wireless/rtlwifi/pci.c @@ -654,7 +654,8 @@ static void _rtl_pci_tx_isr(struct ieee80211_hw *hw, int prio) if (((rtlpriv->link_info.num_rx_inperiod + rtlpriv->link_info.num_tx_inperiod) > 8) || (rtlpriv->link_info.num_rx_inperiod > 2)) { - schedule_work(&rtlpriv->works.lps_leave_work); + rtlpriv->enter_ps = false; + schedule_work(&rtlpriv->works.lps_change_work); } } @@ -783,9 +784,10 @@ static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw) _rtl_receive_one(hw, skb, rx_status); if (((rtlpriv->link_info.num_rx_inperiod + - rtlpriv->link_info.num_tx_inperiod) > 8) || - (rtlpriv->link_info.num_rx_inperiod > 2)) { - schedule_work(&rtlpriv->works.lps_leave_work); + rtlpriv->link_info.num_tx_inperiod) > 8) || + (rtlpriv->link_info.num_rx_inperiod > 2)) { + rtlpriv->enter_ps = false; + schedule_work(&rtlpriv->works.lps_change_work); } dev_kfree_skb_any(skb); @@ -1005,13 +1007,17 @@ static void _rtl_pci_prepare_bcn_tasklet(struct ieee80211_hw *hw) return; } -static void rtl_lps_leave_work_callback(struct work_struct *work) +static void rtl_lps_change_work_callback(struct work_struct *work) { struct rtl_works *rtlworks = - container_of(work, struct rtl_works, lps_leave_work); + container_of(work, struct rtl_works, lps_change_work); struct ieee80211_hw *hw = rtlworks->hw; + struct rtl_priv *rtlpriv = rtl_priv(hw); - rtl_lps_leave(hw); + if (rtlpriv->enter_ps) + rtl_lps_enter(hw); + else + rtl_lps_leave(hw); } static void _rtl_pci_init_trx_var(struct ieee80211_hw *hw) @@ -1075,7 +1081,8 @@ static void _rtl_pci_init_struct(struct ieee80211_hw *hw, tasklet_init(&rtlpriv->works.irq_prepare_bcn_tasklet, (void (*)(unsigned long))_rtl_pci_prepare_bcn_tasklet, (unsigned long)hw); - INIT_WORK(&rtlpriv->works.lps_leave_work, rtl_lps_leave_work_callback); + INIT_WORK(&rtlpriv->works.lps_change_work, + rtl_lps_change_work_callback); } static int _rtl_pci_init_tx_ring(struct ieee80211_hw *hw, @@ -1561,7 +1568,7 @@ static void rtl_pci_deinit(struct ieee80211_hw *hw) synchronize_irq(rtlpci->pdev->irq); tasklet_kill(&rtlpriv->works.irq_tasklet); - cancel_work_sync(&rtlpriv->works.lps_leave_work); + cancel_work_sync(&rtlpriv->works.lps_change_work); flush_workqueue(rtlpriv->works.rtl_wq); destroy_workqueue(rtlpriv->works.rtl_wq); @@ -1636,7 +1643,7 @@ static void rtl_pci_stop(struct ieee80211_hw *hw) set_hal_stop(rtlhal); rtlpriv->cfg->ops->disable_interrupt(hw); - cancel_work_sync(&rtlpriv->works.lps_leave_work); + cancel_work_sync(&rtlpriv->works.lps_change_work); spin_lock_irqsave(&rtlpriv->locks.rf_ps_lock, flags); while (ppsc->rfchange_inprogress) { diff --git a/drivers/net/wireless/rtlwifi/wifi.h b/drivers/net/wireless/rtlwifi/wifi.h index 7ec95cb1ee1b..70193a519547 100644 --- a/drivers/net/wireless/rtlwifi/wifi.h +++ b/drivers/net/wireless/rtlwifi/wifi.h @@ -1796,7 +1796,7 @@ struct rtl_works { struct delayed_work ps_rfon_wq; struct delayed_work fwevt_wq; - struct work_struct lps_leave_work; + struct work_struct lps_change_work; }; struct rtl_debug { @@ -1966,6 +1966,7 @@ struct rtl_priv { bool bt_operation_on; }; }; + bool enter_ps; /* true when entering PS */ /*This must be the last item so that it points to the data allocated -- GitLab