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b43: Dereference of wl->current_dev must be protected by wl->mutex

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Put all access to wl->current_dev under protection of the mutex.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Cc: Larry Finger <larry.finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Michael Buesch 2007-10-28 15:59:58 +01:00 committed by David S. Miller
parent 0c1d379d2e
commit c6dfc9a8ec
1 changed files with 14 additions and 16 deletions
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30
drivers/net/wireless/b43/main.c
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@ -2810,18 +2810,25 @@ static int b43_dev_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
struct ieee80211_key_conf *key)
{
struct b43_wl *wl = hw_to_b43_wl(hw);
struct b43_wldev *dev = wl->current_dev;
struct b43_wldev *dev;
unsigned long flags;
u8 algorithm;
u8 index;
int err = -EINVAL;
int err;
DECLARE_MAC_BUF(mac);
if (modparam_nohwcrypt)
return -ENOSPC; /* User disabled HW-crypto */
if (!dev)
return -ENODEV;
mutex_lock(&wl->mutex);
spin_lock_irqsave(&wl->irq_lock, flags);
dev = wl->current_dev;
err = -ENODEV;
if (!dev || b43_status(dev) < B43_STAT_INITIALIZED)
goto out_unlock;
err = -EINVAL;
switch (key->alg) {
case ALG_WEP:
if (key->keylen == 5)
@ -2837,20 +2844,11 @@ static int b43_dev_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
break;
default:
B43_WARN_ON(1);
goto out;
}
index = (u8) (key->keyidx);
if (index > 3)
goto out;
mutex_lock(&wl->mutex);
spin_lock_irqsave(&wl->irq_lock, flags);
if (b43_status(dev) < B43_STAT_INITIALIZED) {
err = -ENODEV;
goto out_unlock;
}
index = (u8) (key->keyidx);
if (index > 3)
goto out_unlock;
switch (cmd) {
case SET_KEY: