Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=6e01d1a4b2f7110201e7fe16e561a721d76fab3e
Commit: 6e01d1a4b2f7110201e7fe16e561a721d76fab3e
Parent: 136492b275e0dd02d842b94507d66267d18d341c
Author: Alexey Demin <[EMAIL PROTECTED]>
AuthorDate: Wed Jan 30 16:52:27 2008 +0800
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Sun Feb 3 04:28:50 2008 -0800
EMAC driver: fix bug - invalidate data cache of new_skb->data range when
cache is WB
It prevents overwritting new data from DMA.
Signed-off-by: Alexey Demin <[EMAIL PROTECTED]>
Signed-off-by: Bryan Wu <[EMAIL PROTECTED]>
Signed-off-by: Jeff Garzik <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[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,
-
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