From: Andreas Fenkart <andreas.fenkart@xxxxxxxxxxxxxxxxxxx>
ra_list_spinlock is used to protect struct mwifiex_wmm_desc and
embedded structures such as ra_list. tid_tbl_lock while more fine
grained, is not used but in one function. That function is not
called reentrantly. To protect ra_list from concurrent modification
ra_list_spinlock must be held.
Signed-off-by: Andreas Fenkart <andreas.fenkart@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Avinash Patil <patila@xxxxxxxxxxx>
Signed-off-by: Bing Zhao <bzhao@xxxxxxxxxxx>
---
drivers/net/wireless/mwifiex/init.c | 4 +---
drivers/net/wireless/mwifiex/main.h | 2 --
drivers/net/wireless/mwifiex/wmm.c | 8 ++++----
3 files changed, 5 insertions(+), 9 deletions(-)
diff --git a/drivers/net/wireless/mwifiex/init.c b/drivers/net/wireless/mwifiex/init.c
index 003c014..42d7f0a 100644
--- a/drivers/net/wireless/mwifiex/init.c
+++ b/drivers/net/wireless/mwifiex/init.c
@@ -533,10 +533,8 @@ int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
if (!adapter->priv[i])
continue;
priv = adapter->priv[i];
- for (j = 0; j < MAX_NUM_TID; ++j) {
+ for (j = 0; j < MAX_NUM_TID; ++j)
INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
- spin_lock_init(&priv->wmm.tid_tbl_ptr[j].tid_tbl_lock);
- }
INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
INIT_LIST_HEAD(&priv->sta_list);
diff --git a/drivers/net/wireless/mwifiex/main.h b/drivers/net/wireless/mwifiex/main.h
index fef89fd..622b17f 100644
--- a/drivers/net/wireless/mwifiex/main.h
+++ b/drivers/net/wireless/mwifiex/main.h
@@ -213,8 +213,6 @@ struct mwifiex_ra_list_tbl {
struct mwifiex_tid_tbl {
struct list_head ra_list;
- /* spin lock for tid table */
- spinlock_t tid_tbl_lock;
struct mwifiex_ra_list_tbl *ra_list_curr;
};
diff --git a/drivers/net/wireless/mwifiex/wmm.c b/drivers/net/wireless/mwifiex/wmm.c
index 1b039ba..c1d8488 100644
--- a/drivers/net/wireless/mwifiex/wmm.c
+++ b/drivers/net/wireless/mwifiex/wmm.c
@@ -927,12 +927,12 @@ mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
if (!tid_ptr->ra_list_curr)
continue;
- spin_lock_irqsave(&tid_ptr->tid_tbl_lock,
- flags);
+ spin_lock_irqsave(&priv_tmp->wmm.
+ ra_list_spinlock, flags);
is_list_empty =
list_empty(&tid_ptr->ra_list);
- spin_unlock_irqrestore(&tid_ptr->tid_tbl_lock,
- flags);
+ spin_unlock_irqrestore(&priv_tmp->wmm.
+ ra_list_spinlock, flags);
if (is_list_empty)
continue;
--
1.7.0.2
--
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