mwifiex: remove_bss_prio_lock

This patch does away with spinlock in
mwifiex_wmm_get_highest_priolist_ptr in order to improve TP.
Signed-off-by: Zhaoyang Liu <liuzy@marvell.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/mwifiex/wmm.c

@@ -944,14 +944,11 @@ mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
 	struct mwifiex_ra_list_tbl *ptr;
 	struct mwifiex_tid_tbl *tid_ptr;
 	atomic_t *hqp;
-	unsigned long flags_bss, flags_ra;
+	unsigned long flags_ra;
 	int i, j;
 
 	/* check the BSS with highest priority first */
 	for (j = adapter->priv_num - 1; j >= 0; --j) {
-		spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock,
-				  flags_bss);
-
 		/* iterate over BSS with the equal priority */
 		list_for_each_entry(adapter->bss_prio_tbl[j].bss_prio_cur,
 				    &adapter->bss_prio_tbl[j].bss_prio_head,
@@ -987,19 +984,15 @@ mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
 			}
 		}
 
-		spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
-				       flags_bss);
 	}
 
 	return NULL;
 
 found:
-	/* holds bss_prio_lock / ra_list_spinlock */
+	/* holds ra_list_spinlock */
 	if (atomic_read(hqp) > i)
 		atomic_set(hqp, i);
 	spin_unlock_irqrestore(&priv_tmp->wmm.ra_list_spinlock, flags_ra);
-	spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
-			       flags_bss);
 
 	*priv = priv_tmp;
 	*tid = tos_to_tid[i];