wl18xx: count HW block spare based correctly on keys

We have no idea how many VIFs there are requiring a special spare, we
know just about the number of keys set. Rename the counter appropriately
and toggle it whenever a special key is added/removed.
Previously this was only changed once, since it was toggled whenever
the actual spare was changed.

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

diff --git a/drivers/net/wireless/ti/wl18xx/main.c b/drivers/net/wireless/ti/wl18xx/main.c
index ec331e9e0b740a0f0b9a3e29cb32ff56f5a64a32..6b57686c5b0d5c586a826dd524512452ce08b691 100644 (file)
--- a/drivers/net/wireless/ti/wl18xx/main.c
+++ b/drivers/net/wireless/ti/wl18xx/main.c
@@ -1021,7 +1021,7 @@ static int wl18xx_hw_init(struct wl1271 *wl)
 
        /* (re)init private structures. Relevant on recovery as well. */
        priv->last_fw_rls_idx = 0;
-       priv->extra_spare_vif_count = 0;
+       priv->extra_spare_key_count = 0;
 
        /* set the default amount of spare blocks in the bitmap */
        ret = wl18xx_set_host_cfg_bitmap(wl, WL18XX_TX_HW_BLOCK_SPARE);
@@ -1285,8 +1285,8 @@ static int wl18xx_get_spare_blocks(struct wl1271 *wl, bool is_gem)
 {
        struct wl18xx_priv *priv = wl->priv;
 
-       /* If we have VIFs requiring extra spare, indulge them */
-       if (priv->extra_spare_vif_count)
+       /* If we have keys requiring extra spare, indulge them */
+       if (priv->extra_spare_key_count)
                return WL18XX_TX_HW_EXTRA_BLOCK_SPARE;
 
        return WL18XX_TX_HW_BLOCK_SPARE;
@@ -1298,42 +1298,48 @@ static int wl18xx_set_key(struct wl1271 *wl, enum set_key_cmd cmd,
                          struct ieee80211_key_conf *key_conf)
 {
        struct wl18xx_priv *priv = wl->priv;
-       bool change_spare = false;
+       bool change_spare = false, special_enc;
        int ret;
 
+       wl1271_debug(DEBUG_CRYPT, "extra spare keys before: %d",
+                    priv->extra_spare_key_count);
+
+       special_enc = key_conf->cipher == WL1271_CIPHER_SUITE_GEM ||
+                     key_conf->cipher == WLAN_CIPHER_SUITE_TKIP;
+
+       ret = wlcore_set_key(wl, cmd, vif, sta, key_conf);
+       if (ret < 0)
+               goto out;
+
        /*
-        * when adding the first or removing the last GEM/TKIP interface,
+        * when adding the first or removing the last GEM/TKIP key,
         * we have to adjust the number of spare blocks.
         */
-       change_spare = (key_conf->cipher == WL1271_CIPHER_SUITE_GEM ||
-               key_conf->cipher == WLAN_CIPHER_SUITE_TKIP) &&
-               ((priv->extra_spare_vif_count == 0 && cmd == SET_KEY) ||
-                (priv->extra_spare_vif_count == 1 && cmd == DISABLE_KEY));
+       if (special_enc) {
+               if (cmd == SET_KEY) {
+                       /* first key */
+                       change_spare = (priv->extra_spare_key_count == 0);
+                       priv->extra_spare_key_count++;
+               } else if (cmd == DISABLE_KEY) {
+                       /* last key */
+                       change_spare = (priv->extra_spare_key_count == 1);
+                       priv->extra_spare_key_count--;
+               }
+       }
 
-       /* no need to change spare - just regular set_key */
-       if (!change_spare)
-               return wlcore_set_key(wl, cmd, vif, sta, key_conf);
+       wl1271_debug(DEBUG_CRYPT, "extra spare keys after: %d",
+                    priv->extra_spare_key_count);
 
-       ret = wlcore_set_key(wl, cmd, vif, sta, key_conf);
-       if (ret < 0)
+       if (!change_spare)
                goto out;
 
        /* key is now set, change the spare blocks */
-       if (cmd == SET_KEY) {
+       if (priv->extra_spare_key_count)
                ret = wl18xx_set_host_cfg_bitmap(wl,
                                        WL18XX_TX_HW_EXTRA_BLOCK_SPARE);
-               if (ret < 0)
-                       goto out;
-
-               priv->extra_spare_vif_count++;
-       } else {
+       else
                ret = wl18xx_set_host_cfg_bitmap(wl,
                                        WL18XX_TX_HW_BLOCK_SPARE);
-               if (ret < 0)
-                       goto out;
-
-               priv->extra_spare_vif_count--;
-       }
 
 out:
        return ret;

diff --git a/drivers/net/wireless/ti/wl18xx/wl18xx.h b/drivers/net/wireless/ti/wl18xx/wl18xx.h
index e6ea78c7da36cbd98f7958e0b095fb54581c7522..b6739e79efcfa33bc45c18ad9f205bcdbc2dce5a 100644 (file)
--- a/drivers/net/wireless/ti/wl18xx/wl18xx.h
+++ b/drivers/net/wireless/ti/wl18xx/wl18xx.h
@@ -49,8 +49,8 @@ struct wl18xx_priv {
        /* Index of last released Tx desc in FW */
        u8 last_fw_rls_idx;
 
-       /* number of VIFs requiring extra spare mem-blocks */
-       int extra_spare_vif_count;
+       /* number of keys requiring extra spare mem-blocks */
+       int extra_spare_key_count;
 };
 
 #define WL18XX_FW_MAX_TX_STATUS_DESC 33