mirror of https://gitee.com/openkylin/linux.git
mwifiex: more_task flag for main_process
This patch handles a corner case where TX packet would remain in driver queue till next packet comes in. Here is sequence: 1. TX packet is queued via hard_start_xmit and main_work is queued 2. SDIO interrupt comes in which directly call mwifiex_main_process. This starts executing main superloop. 3. Now work from step1 is scheduled but at first check itself it sees mwifiex_processing is set and exits. 4. Now if superloop from step2 has passed TX processing part of superloop this packet would remain in queue until next packet/command/SDIO interrupt arrives and queues main_work. This patch fixes this corner case by defining more_task flag which is set when mwifiex_processing is found to be true. At end of superloop we again check if more_task flag is set and if set, execute superloop again. Signed-off-by: Shengzhen Li <szli@marvell.com> Signed-off-by: Amitkumar Karwar <akarwar@marvell.com> Signed-off-by: Cathy Luo <cluo@marvell.com> Signed-off-by: Avinash Patil <patila@marvell.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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@ -190,14 +190,16 @@ int mwifiex_main_process(struct mwifiex_adapter *adapter)
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/* Check if already processing */
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if (adapter->mwifiex_processing) {
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adapter->more_task_flag = true;
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spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
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goto exit_main_proc;
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} else {
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adapter->mwifiex_processing = true;
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spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
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}
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process_start:
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do {
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adapter->more_task_flag = false;
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spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
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if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) ||
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(adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY))
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break;
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@ -238,6 +240,7 @@ int mwifiex_main_process(struct mwifiex_adapter *adapter)
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adapter->pm_wakeup_fw_try = true;
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mod_timer(&adapter->wakeup_timer, jiffies + (HZ*3));
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adapter->if_ops.wakeup(adapter);
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spin_lock_irqsave(&adapter->main_proc_lock, flags);
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continue;
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}
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@ -295,8 +298,10 @@ int mwifiex_main_process(struct mwifiex_adapter *adapter)
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if ((adapter->ps_state == PS_STATE_SLEEP) ||
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(adapter->ps_state == PS_STATE_PRE_SLEEP) ||
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(adapter->ps_state == PS_STATE_SLEEP_CFM) ||
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adapter->tx_lock_flag)
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adapter->tx_lock_flag){
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spin_lock_irqsave(&adapter->main_proc_lock, flags);
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continue;
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}
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if (!adapter->cmd_sent && !adapter->curr_cmd) {
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if (mwifiex_exec_next_cmd(adapter) == -1) {
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@ -330,15 +335,12 @@ int mwifiex_main_process(struct mwifiex_adapter *adapter)
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}
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break;
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}
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spin_lock_irqsave(&adapter->main_proc_lock, flags);
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} while (true);
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spin_lock_irqsave(&adapter->main_proc_lock, flags);
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if (!adapter->delay_main_work &&
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(adapter->int_status || IS_CARD_RX_RCVD(adapter))) {
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spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
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if (adapter->more_task_flag)
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goto process_start;
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}
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adapter->mwifiex_processing = false;
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spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
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@ -774,6 +774,7 @@ struct mwifiex_adapter {
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/* spin lock for main process */
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spinlock_t main_proc_lock;
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u32 mwifiex_processing;
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u8 more_task_flag;
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u16 tx_buf_size;
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u16 curr_tx_buf_size;
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u32 ioport;
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