From 0b6ddeecb52feb3da17585c5d076da0f67dde2a0 Mon Sep 17 00:00:00 2001 From: Lucas Stach Date: Mon, 2 Mar 2015 09:59:36 +0100 Subject: net: cpsw: prevent stray cache writeback The cache should be invalidated when transfering ownership of a buffer to the device. Otherwise the writeback of dirty cache lines can corrupt the hardware written data. Signed-off-by: Lucas Stach Tested-by: Jan Weitzel Signed-off-by: Sascha Hauer --- drivers/net/cpsw.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/net/cpsw.c') diff --git a/drivers/net/cpsw.c b/drivers/net/cpsw.c index 799fac89a2..301b8a9dfd 100644 --- a/drivers/net/cpsw.c +++ b/drivers/net/cpsw.c @@ -888,6 +888,7 @@ static int cpsw_recv(struct eth_device *edev) while (cpdma_process(priv, &priv->rx_chan, &buffer, &len) >= 0) { dma_inv_range((ulong)buffer, (ulong)buffer + len); net_receive(edev, buffer, len); + dma_inv_range((ulong)buffer, (ulong)buffer + len); cpdma_submit(priv, &priv->rx_chan, buffer, PKTSIZE); } -- cgit v1.2.3