mwifiex: CPU mips optimization with NO_PKT_PRIO_TID

If we go through the entire for loop in
mwifiex_wmm_get_highest_priolist_ptr() and don't find any packets,
set highest_queued_prio to NO_PKT_PRIO_TID (< LOW_PRIO_TID).

Signed-off-by: Marc Yang <yangyang@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/mwifiex/main.h b/drivers/net/wireless/mwifiex/main.h
index ea3184d..3154b0a 100644 (file)
--- a/drivers/net/wireless/mwifiex/main.h
+++ b/drivers/net/wireless/mwifiex/main.h
@@ -202,6 +202,7 @@ struct mwifiex_tid_tbl {
 #define WMM_HIGHEST_PRIORITY           7
 #define HIGH_PRIO_TID                          7
 #define LOW_PRIO_TID                           0
+#define NO_PKT_PRIO_TID                                (-1)
 
 struct mwifiex_wmm_desc {
        struct mwifiex_tid_tbl tid_tbl_ptr[MAX_NUM_TID];

diff --git a/drivers/net/wireless/mwifiex/wmm.c b/drivers/net/wireless/mwifiex/wmm.c
index 784ad4c..91634da 100644 (file)
--- a/drivers/net/wireless/mwifiex/wmm.c
+++ b/drivers/net/wireless/mwifiex/wmm.c
@@ -946,6 +946,12 @@ mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
                                } while (ptr != head);
                        }
 
+                       /* No packet at any TID for this priv. Mark as such
+                        * to skip checking TIDs for this priv (until pkt is
+                        * added).
+                        */
+                       atomic_set(hqp, NO_PKT_PRIO_TID);
+
                        /* Get next bss priority node */
                        bssprio_node = list_first_entry(&bssprio_node->list,
                                                struct mwifiex_bss_prio_node,