mwifiex: skipping pending commands after unload

We skip downloading other commands after FUNC_SHUTDOWN is queued
during driver unload. Main thread should be woken up each time
after freeing skipped command so that FUNC_SHUTDOWN gets served
in case if there are other pending commands before FUNC_SHUTDOWN.
Also, call mwifiex_complete_cmd() only for synchronous commands.

Reported-by: Avery Pennarun <apenwarr@gmail.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Maithili Hinge <maithili@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/mwifiex/cmdevt.c

@@ -165,8 +165,10 @@ static int mwifiex_dnld_cmd_to_fw(struct mwifiex_private *priv,
 		dev_err(adapter->dev,
 			"DNLD_CMD: FW in reset state, ignore cmd %#x\n",
 			cmd_code);
-		mwifiex_complete_cmd(adapter, cmd_node);
+		if (cmd_node->wait_q_enabled)
+			mwifiex_complete_cmd(adapter, cmd_node);
 		mwifiex_recycle_cmd_node(adapter, cmd_node);
+		queue_work(adapter->workqueue, &adapter->main_work);
 		return -1;
 	}