[PATCH] b43legacy: Fix a sleep-in-atomic bug in b43legacy_op_bss_info_changed
Jia-Ju Bai <[email protected]>
| Newsgroups | org.infradead.lists.b43-dev,org.kernel.vger.linux-kernel,org.kernel.vger.linux-wireless,org.kernel.vger.netdev |
|---|---|
| Message-ID | <[email protected]> |
The driver may sleep under a spin lock, and the function call path is:
b43legacy_op_bss_info_changed (acquire the lock by spin_lock_irqsave)
b43legacy_synchronize_irq
synchronize_irq --> may sleep
To fix it, the lock is released before b43legacy_synchronize_irq, and the
lock is acquired again after this function.
Signed-off-by: Jia-Ju Bai <[email protected]>
---
drivers/net/wireless/broadcom/b43legacy/main.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/wireless/broadcom/b43legacy/main.c b/drivers/net/wireless/broadcom/b43legacy/main.c
index f1e3dad..31ead21 100644
--- a/drivers/net/wireless/broadcom/b43legacy/main.c
+++ b/drivers/net/wireless/broadcom/b43legacy/main.c
@@ -2859,7 +2859,9 @@ static void b43legacy_op_bss_info_changed(struct ieee80211_hw *hw,
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
if (changed & BSS_CHANGED_BSSID) {
+ spin_unlock_irqrestore(&wl->irq_lock, flags);
b43legacy_synchronize_irq(dev);
+ spin_lock_irqsave(&wl->irq_lock, flags);
if (conf->bssid)
memcpy(wl->bssid, conf->bssid, ETH_ALEN);
--
1.7.9.5