Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem

1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/net/wireless/b43/dma.c b/drivers/net/wireless/b43/dma.c
index 523355b87659..f7c70b3a6ea9 100644
--- a/drivers/net/wireless/b43/dma.c
+++ b/drivers/net/wireless/b43/dma.c
@@ -1728,6 +1728,25 @@ drop_recycle_buffer:
         sync_descbuffer_for_device(ring, dmaaddr, ring->rx_buffersize);
 }
 
+void b43_dma_handle_rx_overflow(struct b43_dmaring *ring)
+{
+        int current_slot, previous_slot;
+
+        B43_WARN_ON(ring->tx);
+
+        /* Device has filled all buffers, drop all packets and let TCP
+         * decrease speed.
+         * Decrement RX index by one will let the device to see all slots
+         * as free again
+         */
+        /*
+        *TODO: How to increase rx_drop in mac80211?
+        */
+        current_slot = ring->ops->get_current_rxslot(ring);
+        previous_slot = prev_slot(ring, current_slot);
+        ring->ops->set_current_rxslot(ring, previous_slot);
+}
+
 void b43_dma_rx(struct b43_dmaring *ring)
 {
         const struct b43_dma_ops *ops = ring->ops;