wl12xx: change bits in the link_map under spin lock

These bits are used in op_tx to determine if a packet should be dropped.
As such we should use the spin lock to sync the state.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/cmd.c b/drivers/net/wireless/wl12xx/cmd.c
index b776d9d5efe8..ef994dacf8d2 100644
--- a/drivers/net/wireless/wl12xx/cmd.c
+++ b/drivers/net/wireless/wl12xx/cmd.c
@@ -459,23 +459,32 @@ out:
 
 int wl12xx_allocate_link(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 *hlid)
 {
+        unsigned long flags;
         u8 link = find_first_zero_bit(wl->links_map, WL12XX_MAX_LINKS);
         if (link >= WL12XX_MAX_LINKS)
                 return -EBUSY;
 
+        /* these bits are used by op_tx */
+        spin_lock_irqsave(&wl->wl_lock, flags);
         __set_bit(link, wl->links_map);
         __set_bit(link, wlvif->links_map);
+        spin_unlock_irqrestore(&wl->wl_lock, flags);
         *hlid = link;
         return 0;
 }
 
 void wl12xx_free_link(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 *hlid)
 {
+        unsigned long flags;
+
         if (*hlid == WL12XX_INVALID_LINK_ID)
                 return;
 
+        /* these bits are used by op_tx */
+        spin_lock_irqsave(&wl->wl_lock, flags);
         __clear_bit(*hlid, wl->links_map);
         __clear_bit(*hlid, wlvif->links_map);
+        spin_unlock_irqrestore(&wl->wl_lock, flags);
         *hlid = WL12XX_INVALID_LINK_ID;
 }