Some platforms cannot invalidate the cache at four byte intervals, so invalidate the entire descriptor.
Signed-off-by: Ian Campbell ijc@hellion.org.uk --- drivers/net/designware.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/net/designware.c b/drivers/net/designware.c index 1120f70..7d14cec 100644 --- a/drivers/net/designware.c +++ b/drivers/net/designware.c @@ -280,10 +280,13 @@ static int dw_eth_send(struct eth_device *dev, void *packet, int length) u32 desc_num = priv->tx_currdescnum; struct dmamacdescr *desc_p = &priv->tx_mac_descrtable[desc_num];
- /* Invalidate only "status" field for the following check */ - invalidate_dcache_range((unsigned long)&desc_p->txrx_status, - (unsigned long)&desc_p->txrx_status + - sizeof(desc_p->txrx_status)); + /* Strictly we only need to invalidate the "status" field for + * the following check, but on some platforms we cannot + * invalidate only 4 bytes, so invalidate the the whole thing + * which is known to be DMA aligned. */ + invalidate_dcache_range((unsigned long)desc_p, + (unsigned long)desc_p + + sizeof(struct dmamacdescr));
/* Check if the descriptor is owned by CPU */ if (desc_p->txrx_status & DESC_TXSTS_OWNBYDMA) {