From: Douglas Anderson <dianders@xxxxxxxxxxxx>
The mwifiex_11n_delba() function walked the rx_reorder_tbl_ptr without
holding the lock, which was an obvious violation.
Grab the lock.
NOTE: we hold the lock while calling mwifiex_send_delba(). There's also
several callers in 11n_rxreorder.c that hold the lock and the comments
in the struct sound just like very other list/lock pair -- as if the
lock should definitely be help for all operations like this.
Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
Signed-off-by: Brian Norris <briannorris@xxxxxxxxxxxx>
---
drivers/net/wireless/marvell/mwifiex/11n.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/marvell/mwifiex/11n.c b/drivers/net/wireless/marvell/mwifiex/11n.c
index c75b6abf16a0..16c77c27f1b6 100644
--- a/drivers/net/wireless/marvell/mwifiex/11n.c
+++ b/drivers/net/wireless/marvell/mwifiex/11n.c
@@ -653,11 +653,13 @@ int mwifiex_send_delba(struct mwifiex_private *priv, int tid, u8 *peer_mac,
void mwifiex_11n_delba(struct mwifiex_private *priv, int tid)
{
struct mwifiex_rx_reorder_tbl *rx_reor_tbl_ptr;
+ unsigned long flags;
+ spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
if (list_empty(&priv->rx_reorder_tbl_ptr)) {
dev_dbg(priv->adapter->dev,
"mwifiex_11n_delba: rx_reorder_tbl_ptr empty\n");
- return;
+ goto exit;
}
list_for_each_entry(rx_reor_tbl_ptr, &priv->rx_reorder_tbl_ptr, list) {
@@ -666,9 +668,11 @@ void mwifiex_11n_delba(struct mwifiex_private *priv, int tid)
"Send delba to tid=%d, %pM\n",
tid, rx_reor_tbl_ptr->ta);
mwifiex_send_delba(priv, tid, rx_reor_tbl_ptr->ta, 0);
- return;
+ goto exit;
}
}
+exit:
+ spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
}
/*
--
2.13.0.rc2.291.g57267f2277-goog
