[bug report] rsi: immediate wakeup bit and priority for TX command packets

[Dan Carpenter <dan.carpenter@oracle.com>]

Hello Prameela Rani Garnepudi,

The patch 9a629fafe7d8: "rsi: immediate wakeup bit and priority for
TX command packets" from Jul 10, 2017, leads to the following static
checker warning:

	drivers/net/wireless/rsi/rsi_91x_mgmt.c:277 rsi_send_internal_mgmt_frame()
	error: potentially dereferencing uninitialized 'desc'.

drivers/net/wireless/rsi/rsi_91x_mgmt.c
   267  static int rsi_send_internal_mgmt_frame(struct rsi_common *common,
   268                                          struct sk_buff *skb)
   269  {
   270          struct skb_info *tx_params;
   271          struct rsi_cmd_desc *desc;
                                     ^^^^
   272  
   273          if (skb == NULL) {
   274                  rsi_dbg(ERR_ZONE, "%s: Unable to allocate skb\n", __func__);
   275                  return -ENOMEM;
   276          }
   277          desc->desc_dword0.len_qno |= cpu_to_le16(DESC_IMMEDIATE_WAKEUP);
                ^^^^^^

   278          skb->priority = MGMT_SOFT_Q;
   279          tx_params = (struct skb_info *)&IEEE80211_SKB_CB(skb)->driver_data;
   280          tx_params->flags |= INTERNAL_MGMT_PKT;
   281          skb_queue_tail(&common->tx_queue[MGMT_SOFT_Q], skb);
   282          rsi_set_event(&common->tx_thread.event);
   283          return 0;
   284  }

regards,
dan carpenter