b43: Fixup set_key handling
This fixes the key handling for mac80211's new key->flags.
It also adds TX locking to the set_key handler and adds a comment why this is required.
This doesn't fix any known bugs.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index c788bad..dad0781 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -937,8 +937,7 @@
B43_WARN_ON(dev->key[i].keyconf == keyconf);
}
if (index < 0) {
- /* Either pairwise key or address is 00:00:00:00:00:00
- * for transmit-only keys. Search the index. */
+ /* Pairwise key. Get an empty slot for the key. */
if (b43_new_kidx_api(dev))
sta_keys_start = 4;
else
@@ -951,7 +950,7 @@
}
}
if (index < 0) {
- b43err(dev->wl, "Out of hardware key memory\n");
+ b43warn(dev->wl, "Out of hardware key memory\n");
return -ENOSPC;
}
} else
@@ -3525,7 +3524,6 @@
{
struct b43_wl *wl = hw_to_b43_wl(hw);
struct b43_wldev *dev;
- unsigned long flags;
u8 algorithm;
u8 index;
int err;
@@ -3534,7 +3532,15 @@
return -ENOSPC; /* User disabled HW-crypto */
mutex_lock(&wl->mutex);
- spin_lock_irqsave(&wl->irq_lock, flags);
+ spin_lock_irq(&wl->irq_lock);
+ write_lock(&wl->tx_lock);
+ /* Why do we need all this locking here?
+ * mutex -> Every config operation must take it.
+ * irq_lock -> We modify the dev->key array, which is accessed
+ * in the IRQ handlers.
+ * tx_lock -> We modify the dev->key array, which is accessed
+ * in the TX handler.
+ */
dev = wl->current_dev;
err = -ENODEV;
@@ -3551,7 +3557,7 @@
err = -EINVAL;
switch (key->alg) {
case ALG_WEP:
- if (key->keylen == 5)
+ if (key->keylen == LEN_WEP40)
algorithm = B43_SEC_ALGO_WEP40;
else
algorithm = B43_SEC_ALGO_WEP104;
@@ -3578,17 +3584,14 @@
goto out_unlock;
}
- if (is_broadcast_ether_addr(addr)) {
- /* addr is FF:FF:FF:FF:FF:FF for default keys */
- err = b43_key_write(dev, index, algorithm,
- key->key, key->keylen, NULL, key);
- } else {
- /*
- * either pairwise key or address is 00:00:00:00:00:00
- * for transmit-only keys
- */
+ if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
+ /* Pairwise key with an assigned MAC address. */
err = b43_key_write(dev, -1, algorithm,
key->key, key->keylen, addr, key);
+ } else {
+ /* Group key */
+ err = b43_key_write(dev, index, algorithm,
+ key->key, key->keylen, NULL, key);
}
if (err)
goto out_unlock;
@@ -3620,7 +3623,8 @@
addr);
b43_dump_keymemory(dev);
}
- spin_unlock_irqrestore(&wl->irq_lock, flags);
+ write_unlock(&wl->tx_lock);
+ spin_unlock_irq(&wl->irq_lock);
mutex_unlock(&wl->mutex);
return err;