diff options
Diffstat (limited to 'drivers/net/wireless/b43/dma.c')
| -rw-r--r-- | drivers/net/wireless/b43/dma.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/drivers/net/wireless/b43/dma.c b/drivers/net/wireless/b43/dma.c index 7964cc32b258..41a0e9c2b339 100644 --- a/drivers/net/wireless/b43/dma.c +++ b/drivers/net/wireless/b43/dma.c @@ -1334,13 +1334,22 @@ int b43_dma_tx(struct b43_wldev *dev, struct sk_buff *skb) spin_lock_irqsave(&ring->lock, flags); B43_WARN_ON(!ring->tx); - /* Check if the queue was stopped in mac80211, - * but we got called nevertheless. - * That would be a mac80211 bug. */ - B43_WARN_ON(ring->stopped); - if (unlikely(free_slots(ring) < TX_SLOTS_PER_FRAME)) { - b43warn(dev->wl, "DMA queue overflow\n"); + if (unlikely(ring->stopped)) { + /* We get here only because of a bug in mac80211. + * Because of a race, one packet may be queued after + * the queue is stopped, thus we got called when we shouldn't. + * For now, just refuse the transmit. */ + if (b43_debug(dev, B43_DBG_DMAVERBOSE)) + b43err(dev->wl, "Packet after queue stopped\n"); + err = -ENOSPC; + goto out_unlock; + } + + if (unlikely(WARN_ON(free_slots(ring) < TX_SLOTS_PER_FRAME))) { + /* If we get here, we have a real error with the queue + * full, but queues not stopped. */ + b43err(dev->wl, "DMA queue overflow\n"); err = -ENOSPC; goto out_unlock; } |