mwifiex: complete blocked power save handshake in main process

Power save handshake with firmware might be blocked by on-going
data transfer.
this patch check the PS status in main process and complete
previous blocked PS handshake.
this patch also remove redudant check before call
mwifiex_check_ps_cond function.
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Shengzhen Li <szli@marvell.com>
Tested-by: Xinming Hu <huxm@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/marvell/mwifiex/main.c

@@ -308,6 +308,9 @@ int mwifiex_main_process(struct mwifiex_adapter *adapter)
 			/* We have tried to wakeup the card already */
 			if (adapter->pm_wakeup_fw_try)
 				break;
+			if (adapter->ps_state == PS_STATE_PRE_SLEEP)
+				mwifiex_check_ps_cond(adapter);
+
 			if (adapter->ps_state != PS_STATE_AWAKE)
 				break;
 			if (adapter->tx_lock_flag) {
@@ -355,10 +358,8 @@ int mwifiex_main_process(struct mwifiex_adapter *adapter)
 
 		/* Check if we need to confirm Sleep Request
 		   received previously */
-		if (adapter->ps_state == PS_STATE_PRE_SLEEP) {
-			if (!adapter->cmd_sent && !adapter->curr_cmd)
+		if (adapter->ps_state == PS_STATE_PRE_SLEEP)
 			mwifiex_check_ps_cond(adapter);
-		}
 
 		/* * The ps_state may have been changed during processing of
 		 * Sleep Request event.