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| author | Alexey Demin <bf53x@ya.ru> | 2008-01-30 16:52:27 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-02-03 04:28:50 -0800 |
| commit | 6e01d1a4b2f7110201e7fe16e561a721d76fab3e (patch) | |
| tree | 183797360ae581a1bae01a45d3f34cb9a8471413 /drivers/net/bfin_mac.c | |
| parent | 136492b275e0dd02d842b94507d66267d18d341c (diff) | |
| download | lwn-6e01d1a4b2f7110201e7fe16e561a721d76fab3e.tar.gz lwn-6e01d1a4b2f7110201e7fe16e561a721d76fab3e.zip | |
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 <bf53x@ya.ru>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/bfin_mac.c')
| -rw-r--r-- | 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 f2368b71a720..0a17fb48c55c 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, |