Title: [4162] branches/2008R1/drivers/net/bfin_mac.c: [#3870]
invalidate data cache of new_skb->data range when cache is WB
- Revision
- 4162
- Author
- cooloney
- Date
- 2008-01-29 03:19:27 -0600 (Tue, 29 Jan 2008)
Log Message
[#3870] invalidate data cache of new_skb->data range when cache is WB
It prevents overwritting new data from DMA.
Diffstat
bfin_mac.c | 6 ++++++
1 files changed, 6 insertions(+)
Modified Paths
Diff
Modified: branches/2008R1/drivers/net/bfin_mac.c (4161 => 4162)
--- branches/2008R1/drivers/net/bfin_mac.c 2008-01-29 08:43:24 UTC (rev 4161)
+++ branches/2008R1/drivers/net/bfin_mac.c 2008-01-29 09:19:27 UTC (rev 4162)
@@ -656,6 +656,12 @@
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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