3.16.63-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Punnaiah Choudary Kalluri punnaiah.choudary.kalluri@xilinx.com
commit d4c216c54197d741ed8b7ca54f13645dfb3eacde upstream.
Under heavy Rx load, observed that the Hw is updating the USED bit and it is not updating the received frame status to the BD control field. This could be lack of resources for processing the BDs at high data rates. Driver drops the frame associated with this BD but not clearing the USED bit. So, this is causing hang condition as Hw expects USED bit to be cleared for this BD.
Signed-off-by: Punnaiah Choudary Kalluri punnaia@xilinx.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Ben Hutchings ben@decadent.org.uk --- drivers/net/ethernet/cadence/macb.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/net/ethernet/cadence/macb.c +++ b/drivers/net/ethernet/cadence/macb.c @@ -634,6 +634,9 @@ static void gem_rx_refill(struct macb *b
/* properly align Ethernet header */ skb_reserve(skb, NET_IP_ALIGN); + } else { + bp->rx_ring[entry].addr &= ~MACB_BIT(RX_USED); + bp->rx_ring[entry].ctrl = 0; } }