mwifiex: remove global variable cmd_wait_q_required

There is a race condition while queuing synchronous command and
asynchronous command requested from different threads, because
the wait_q_enabled flag is set based on a global variable
cmd_wait_q_required.

The issue is fixed by removing this global variable and using a
unified function with an argument 'sync' passed into the
function.

Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/mwifiex/ie.c

@@ -138,9 +138,9 @@ mwifiex_update_autoindex_ies(struct mwifiex_private *priv,
 	}
 
 	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP)
-		return mwifiex_send_cmd_async(priv, HostCmd_CMD_UAP_SYS_CONFIG,
-					      HostCmd_ACT_GEN_SET,
-					      UAP_CUSTOM_IE_I, ie_list);
+		return mwifiex_send_cmd(priv, HostCmd_CMD_UAP_SYS_CONFIG,
+					HostCmd_ACT_GEN_SET,
+					UAP_CUSTOM_IE_I, ie_list, false);
 
 	return 0;
 }