From: Alexey Demin <[EMAIL PROTECTED]>
It prevents overwritting new data from DMA.
Signed-off-by: Alexey Demin <[EMAIL PROTECTED]>
Signed-off-by: Bryan Wu <[EMAIL PROTECTED]>
---
drivers/net/bfin_mac.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c
index f2368b7..0a17fb4 100644
--- a/drivers/net/bfin_mac.c
+++ b/drivers/net/bfin_mac.c
@@ -651,6 +651,12 @@ static void bf537mac_rx(struct net_device *dev)
current_rx_ptr->skb = new_skb;
current_rx_ptr->desc_a.start_addr = (unsigned long)new_skb->data - 2;
+ /* Invidate the data cache of skb->data range when it is write back
+ * cache. It will prevent overwritting the new data from DMA
+ */
+ blackfin_dcache_invalidate_range((unsigned long)new_skb->head,
+ (unsigned long)new_skb->end);
+
len = (unsigned short)((current_rx_ptr->status.status_word) & RX_FRLEN);
skb_put(skb, len);
blackfin_dcache_invalidate_range((unsigned long)skb->head,
--
1.5.3.4
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
