From 3223db2086c987d4527fdaa487a027b0148e9692 Mon Sep 17 00:00:00 2001 From: Avinash Patil Date: Fri, 12 Sep 2014 20:08:48 +0530 Subject: [PATCH] mwifiex: rework internal scan for association There was an issue with internal scan during association wherein we would complete internal scan on first scan command response. This would cause association failure if AP is not found in first scan response e.g. APs from A band. This patch fixes this issue by completing internal scan only when all scan commands from scan pending queue and command pending queue are sent to FW and response to last scan command is received. Tested-by: Xinmin Hu Signed-off-by: Avinash Patil Signed-off-by: Amitkumar Karwar Signed-off-by: Marc Yang Signed-off-by: Cathy Luo Signed-off-by: John W. Linville --- drivers/net/wireless/mwifiex/scan.c | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/mwifiex/scan.c b/drivers/net/wireless/mwifiex/scan.c index 195ef0ca343f..0c9ed2c730d7 100644 --- a/drivers/net/wireless/mwifiex/scan.c +++ b/drivers/net/wireless/mwifiex/scan.c @@ -1971,9 +1971,34 @@ int mwifiex_cmd_802_11_scan_ext(struct mwifiex_private *priv, /* This function handles the command response of extended scan */ int mwifiex_ret_802_11_scan_ext(struct mwifiex_private *priv) { + struct mwifiex_adapter *adapter = priv->adapter; + struct host_cmd_ds_command *cmd_ptr; + struct cmd_ctrl_node *cmd_node; + unsigned long cmd_flags, scan_flags; + bool complete_scan = false; + dev_dbg(priv->adapter->dev, "info: EXT scan returns successfully\n"); - mwifiex_complete_scan(priv); + spin_lock_irqsave(&adapter->cmd_pending_q_lock, cmd_flags); + spin_lock_irqsave(&adapter->scan_pending_q_lock, scan_flags); + if (list_empty(&adapter->scan_pending_q)) { + complete_scan = true; + list_for_each_entry(cmd_node, &adapter->cmd_pending_q, list) { + cmd_ptr = (void *)cmd_node->cmd_skb->data; + if (le16_to_cpu(cmd_ptr->command) == + HostCmd_CMD_802_11_SCAN_EXT) { + dev_dbg(priv->adapter->dev, + "Scan pending in command pending list"); + complete_scan = false; + break; + } + } + } + spin_unlock_irqrestore(&adapter->scan_pending_q_lock, scan_flags); + spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, cmd_flags); + + if (complete_scan) + mwifiex_complete_scan(priv); return 0; } -- 2.20.1